Lead (Pb)
post-transition-metalSolid
தரநிலை அணு எடை
207.2 u [206.14, 207.94]எலக்ட்ரான் அமைப்பு
[Xe] 6s2 4f14 5d10 6p2உருகுநிலை
327.46 °Cகொதிநிலை
1748.85 °Cஅடர்த்தி
1.1342e+4 kg/m³ஆக்சிஜனேற்ற நிலைகள்
−4, −2, −1, 0, +1, +2, +3, +4எலக்ட்ரான் கவர்திறன் (பாலிங்)
2.33அயனியாக்க ஆற்றல் (1வது)
7.41668 eVகண்டுபிடிக்கப்பட்ட ஆண்டு
2021அணு ஆரம்
180 pmவிவரங்கள்
Lead is a dense, soft post-transition metal with atomic number 82. It is chemically characterized by the +2 oxidation state, with +4 less stable except in selected compounds, a pattern influenced by the inert-pair effect. Lead has been used since antiquity because it is easily smelted and worked, but its toxicity now strongly limits dispersive uses. It remains important where high density, corrosion resistance, low melting point, and radiation attenuation are valuable.
Lead is a bluish-white metal of bright luster. It is very soft, highly malleable, ductile, and a poor conductor of electricity. It is very resistant to corrosion; lead pipes bearing the insignia of Roman emperors, used as drains from the baths, are still in service. It is used in containers for corrosive liquids (such as sulfuric acid) and may be toughened by the addition of a small percentage of antimony or other metals.
The name derives from the Anglo-Saxon lead, which is of unknown origin. The element was known from prehistoric times. The chemical symbol Pb is derived from the Latin plumbum.
<!-- --> <p class="caption">For more information about the natural variations of the atomic weight of lead please read IUPAC Technical Report Variation of lead isotopic composition and atomic weight in terrestrial materials (IUPAC Technical Report) <img src="images/pdf.gif" style="width:auto; margin:0; vertical-align:bottom;"> by Z.-K. Zhu et al Pure Appl. Chem. <strong>93</strong>, 155-166 (2021).
Lead has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores galena (PbS), anglesite (PbSO4), cerussite (PbCO3) and minum (Pb3O4). Although lead makes up only about 0.0013% of the earth's crust, it is not considered to be a rare element since it is easily mined and refined. Most lead is obtained by roasting galena in hot air, although nearly one third of the lead used in the United States is obtained through recycling efforts.
Long known, mentioned in Exodus. The alchemists believed lead to be the oldest metal and associated with the planet Saturn. Native lead occurs in nature, but is rare.
Pure lead is a bluish-gray, lustrous metal when freshly cut. It tarnishes in air to a dull gray surface as oxide and carbonate films form. It is very soft, malleable, and dense, with a low melting point for a metal.
Lead is used in lead–acid batteries, which remain its dominant application. Metallic lead and lead alloys are also used for radiation shielding, ballast, weights, cable sheathing, and some solders or fusible alloys where regulations allow. Historically it was used in pipes, roofing, pigments, ammunition, gasoline additives, and paints, but many such uses have been restricted or eliminated because they release lead to people or the environment.
Lead is a soft, malleable and corrosion resistant material. The ancient Romans used lead to make water pipes, some of which are still in use today. Unfortunately for the ancient Romans, lead is a cumulative poison and the decline of the Roman empire has been blamed, in part, on lead in the water supply. Lead is used to line tanks that store corrosive liquids, such as sulfuric acid (H2SO4). Lead's high density makes it useful as a shield against X-ray and gamma-ray radiation and is used in X-ray machines and nuclear reactors. Lead is also used as a covering on some wires and cables to protect them from corrosion, as a material to absorb vibrations and sounds and in the manufacture of ammunition. Most of the lead used today is used in the production on lead-acid storage batteries, such as the batteries found in automobiles.
Several lead alloys are widely used. Solder, an alloy that is nearly half lead and half tin, is a material with a relatively low melting point that is used to join electrical components, pipes and other metallic items. Type metal, an alloy of lead, tin and antimony, is a material used to make the type used in printing presses and plates. Babbit metal, another lead alloy, is used to reduce friction in bearings.
Lead forms many useful compounds. Lead monoxide (PbO), also known as litharge, is a yellow solid that is used to make some types of glass, such as lead crystal and flint glass, in the vulcanizing of rubber and as a paint pigment. Lead dioxide (PbO2) is a brown material that is used in lead-acid storage batteries. Trilead tetraoxide (Pb3O4), also known as red lead, is used to make a reddish-brown paint that prevents rust on outdoor steel structures. Lead arsenate (Pb3(AsO4)2) has been used as an insecticide although other, less harmful, substances have now largely replaced it. Lead carbonate (PbCO3), also known as cerussite, is a white, poisonous substance that was once widely used as a pigment for white paint. Use of lead carbonate in paints has largely been stopped in favor of titanium oxide (TiO2). Lead sulfate (PbSO4), also known as anglesite, is used in a paint pigment known as sublimed white lead. Lead chromate (PbCrO4), also known as crocoite, is used to produce chrome yellow paint. Lead nitrate (Pb(NO3)2) is used to make fireworks and other pyrotechnics. Lead silicate (PbSiO3) is used to make some types of glass and in the production of rubber and paints.
The metal is very effective as a sound absorber, is used as a radiation shield around X-ray equipment and nuclear reactors, and is used to absorb vibration. White lead, the basic carbonate, sublimed white lead, chrome yellow, and other lead compounds are used extensively in paints, although in recent years the use of lead in paints has been drastically curtailed to eliminate or reduce health hazards.
Lead oxide is used in producing fine "crystal glass" and "flint glass" of a high index of refraction for achromatic lenses. The nitrate and the acetate are soluble salts. Lead salts such as lead arsenate have been used as insecticides, but their use in recent years has been practically eliminated in favor of less harmful organic compounds.
Isotopes in Earth/Planetary Science
The study of lead isotopic compositions is used to model the distribution of pollution in water and on land (Fig. IUPAC.82.1). For example, in one study of Lake Härsvatten in Sweden, the isotope-amount ratio n(206Pb)/n(207Pb) measured at different sediment depths in different areas throughout the lake showed patterns of accumulation of lead pollution. In some cases, these patterns could be related to sediment distribution patterns. Another study used 210Pb (with a half-life of 22.6 years) dating methods to study the vertical accretion of sediments in canals and wetland areas in Louisiana over the last 80 to 100 years [541] R. Bindler, I. Renberg, M. L. Brannvall, O. Emteryd, F. El Daoushy. Limnol. Oceanogr.46, 178 (2001)., [542] R. D. DeLaune, J. H. Whitcomb, W. H. Patrick, J. H. Pardue, S. R. Pezeshki. Estuaries12, 247 (1989)..
Three of the stable isotopes of lead (206Pb, 207Pb, and 208Pb) are produced by the radioactive decay of isotopes of uranium and thorium (238U, 235U, and 232Th, respectively) and are largely unaffected by environmental and metallurgical processes. Therefore, by examining various isotope-amount ratios of lead isotopes, it is possible to approximate the age of a material. It is also possible to use this information to trace the origins of an object or material [543] R. W. Hurst. Environ. Geosci.9, 1 (2002)., [544] University of Arizona. Clues To African Archaeology Found In Lead Isotopes, ScienceDaily (2014), Feb. 25; http://www.sciencedaily.com/releases/2006/04/060404204102.htm., [545] M. Tatsumoto, J. N. Rosholt. Science167, 461 (1970)., [546] R. H. Brill. Philos. Trans. R. Soc. London, Ser. A Mathematical and Physical Sciences.269, 143 (1970)..
Isotopes in Forensic Science and Anthropology
Different geographic regions may have characteristic terrestrial lead isotopic compositions because of variations in the ages and chemical composition of the rocks and minerals in the local environment. Therefore, lead produced at a particular location can have a unique lead isotopic composition and it is possible to trace the history and origins of pollutants by measuring the relative amounts of the four stable isotopes of lead (208Pb, 207Pb, 206Pb, and 204Pb) (Fig. IUPAC.82.2) [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [548] T. J. Chow, J. L. Earl. Science169, 577 (1970).. Using isotopic abundance data, the source of this toxic metal can be identified as it moves through air and water and eventually to living systems [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002).. Scientists have analyzed lead in air pollution in California and found that it originated from Asia. Airborne particles from China have relatively higher amounts of 208Pb, which distinguishes the lead isotopic signature between airborne particles from Asia and North America. This knowledge could have implications in understanding the mixing of particles in the atmosphere and how pollutants are transported over vast distances [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002)., [550] S. A. Ewing, J. N. Christensen, S. T. Brown, R. A. Vancuren, S. S. Cliff, D. J. Depaolo. Environ. Sci. Technol.44, 8911 (2010)., [551] D. Krotz. Lead Isotopes Yield Clues to How Asian Air Pollution Reaches California, Lawrence Berkeley National Laboratory News Center (2014), Feb. 25; http://newscenter.lbl.gov/feature-stories/2010/12/01/lead-isotopes-air-pollution/.. Mapping the distribution of lead pollution by studying 204Pb, 206Pb, 207Pb and 208Pb also allows the identification of those human activities that contribute the highest amounts of lead to the environment [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002)., [552] D. Cicchella, B. De Vivo, A. Lima, S. Albanese, R. A. R. McGill, R. R. Parrish. Geochem. Explor. Environ. Anal.8, 103 (2008)..
The measurement of the isotopic composition of lead in blood can help to determine the source of this toxic element in the body [553] R. H. Gwiazda, D. R. Smith. Environ. Health Perspect.108, 1091 (2000).. Lead is stored in bones and teeth. If a person moves to a different geographical region, the isotopic composition of the lead in the teeth is maintained, recording their place of origin. Bone can store lead for long periods of time (about 20 years), and some skeletal lead may be older and have a different isotopic composition than other skeletal lead. These differences reflect exposure to lead of different origins. By studying the isotope-amount ratio n(206Pb)/n(204Pb) and n(207Pb)/n(206Pb) in bone and teeth, it is possible to determine someone’s place of origin. For example, isotopes of lead were analyzed in the teeth and bones of a human mummy, known as the “Iceman”, to help determine his place of origin [554] B. L. Gulson, B. R. Gillings. Environ. Health Perspect.105, 820 (1997)., [555] W. Müller, H. Fricke, A. N. Halliday, M. T. McCulloch, J. A. Wartho. Science302, 862 (2003)..
210Pb is a relatively short-lived radioactive isotope of lead that is constantly produced by the decay of 222Rn in the atmosphere. While living, humans naturally incorporate 210Pb from the environment into bones and tissues. The amount of 210Pb in the body reaches equilibrium such that the 210Pb ingested is in equilibrium with the 210Pb that decays. When a person dies, this incorporation of 210Pb ceases and the relative amount of this isotope in the body decreases. Therefore, measurement of the 210Pb activity in a corpse can help determine time of death [556] D. R. Smith, J. D. Osterloh, A. R. Flegal. Environ. Health Perspect.104, 60 (1996)., [557] P. Rincon. “Isotopes could improve forensics”, in BBC News Online..
Lead isotope-amount ratios n(206Pb)/n(204Pb), n(207Pb)/n(204Pb), and n(208Pb)/n(204Pb)) along with isotope-amount ratio of silver, n(107Ag)/n(109Ag), and isotope-amount ratio of copper n(65Cu)/n(63Cu) have been used to determine the origin of European coins and to investigate the flow of goods in the world market over time [237] A. M. Desaulty, P. Telouk, E. Albalat, F. Albarede. Proc. Natl. Acad. Sci.108, 9002 (2011).. Metals from Peru and Mexico and those from European mining have distinct isotopic signatures that enable the origin of the metal to be determined by examining the isotopic compositions of silver, copper, and lead in the coins. Abundant silver sources mined in Mexico and Peru in the 16 th century were used to mint coins, but were not a major influence in the European coin market until the 18 th century [237] A. M. Desaulty, P. Telouk, E. Albalat, F. Albarede. Proc. Natl. Acad. Sci.108, 9002 (2011)..
Isotopes in Geochronology
The three natural radioactive-decay chains beginning with 238U, 235U, and 232Th each have comparable half-lives that are much longer than the radioactive isotopes that follow until the production of stable isotopes of 206Pb, 207Pb, and 208Pb, respectively. Therefore, one can measure the relative amounts of the radiogenic isotopes of lead to determine the length of time that has elapsed since uranium and thorium atoms were incorporated into rocks and minerals. Typically, this method is used to date minerals that are tens of millions to billions of years old. The uranium-lead dating method was used to determine some of the first accurate ages of the Earth (about 4.55×109 years) [554] B. L. Gulson, B. R. Gillings. Environ. Health Perspect.105, 820 (1997)., [555] W. Müller, H. Fricke, A. N. Halliday, M. T. McCulloch, J. A. Wartho. Science302, 862 (2003)., [556] D. R. Smith, J. D. Osterloh, A. R. Flegal. Environ. Health Perspect.104, 60 (1996)..
Lead chemistry is dominated by Pb²⁺ compounds, including lead(II) oxide (PbO), lead(II) sulfide (PbS), lead(II) carbonate (PbCO₃), and lead(II) sulfate (PbSO₄). Lead(IV) oxide (PbO₂) is an important oxidizing compound and a key electrode material in lead–acid batteries. Tetraethyllead (Pb(C₂H₅)₄) was formerly used as an antiknock gasoline additive. Many lead salts are sparingly soluble, but solubility and bioavailability depend strongly on pH, ligands, and particle size.
Natural lead is a mixture of four stable isotopes: 204Pb (1.48%), 206Pb (23.6%), 207Pb (22.6%), and 208Pb (52.3%). Lead isotopes are the end products of each of the three series of naturally occurring radioactive elements: 206Pb for the uranium series, 207Pb for the actinium series, and 208Pb for the thorium series. Twenty seven other isotopes of lead, all of which are radioactive, are recognized.
Its alloys include solder, type metal, and various antifriction metals. Great quantities of lead, both as the metal and as the dioxide, are used in storage batteries. Much metal also goes into cable covering, plumbing, ammunition, and in the manufacture of lead tetraethyl.
See more information at the Lead compound page.
Lead and many lead compounds are cumulative poisons. Exposure can damage the nervous system, blood formation, kidneys, and reproduction, with children especially sensitive to neurodevelopmental effects. Major hazards come from dust, fumes, contaminated soil, old paint, plumbing, ammunition residues, and some industrial processes. Metallic lead is less readily absorbed than soluble salts or fine particles but is not considered safe for ingestion or uncontrolled handling.
Care must be used in handling lead as it is a cumulative poison. Environmental concerns with lead poisoning has resulted in a national program to eliminate the lead in gasoline.
Lead occurs naturally in minerals, especially galena, and enters soils and sediments through weathering, mining, smelting, combustion residues, old paints, ammunition, and legacy gasoline emissions. It is not degraded chemically and tends to bind to particles, organic matter, sulfides, and carbonates. Mobility increases in acidic or complexing conditions. Biological accumulation occurs, but lead is not an essential nutrient and can harm wildlife at elevated exposure levels.
Lead is produced chiefly from sulfide ores, often in association with zinc, silver, and copper. Primary production involves concentration, roasting or direct smelting, and refining. Recycling is central to supply, especially from spent lead–acid batteries, because the metal can be recovered efficiently and repeatedly. Demand is closely tied to battery manufacture, while regulations and substitution have reduced markets in pigments, plumbing, fuel additives, and many consumer products.
Lead is obtained chiefly from galena (PbS) by a roasting process. Anglesite, cerussite, and minim are other common lead minerals.
Lead is relatively abundant among the heaviest stable elements because several isotopes are end products of natural radioactive decay chains and are also produced by slow neutron capture in stars. ²⁰⁸Pb is especially stable, with closed proton and neutron shells. In planetary materials, lead is chalcophile and commonly follows sulfur into sulfide minerals rather than remaining evenly distributed in silicates.
- Lead–acid batteries use both lead (Pb) and lead(IV) oxide (PbO₂) as active electrode materials.
- The symbol Pb comes from the Latin name plumbum.
- Fresh lead is noticeably brighter than the dull surface usually seen in air.
- Lead shot and bullets are a continuing source of localized environmental contamination.
- ²⁰⁶Pb, ²⁰⁷Pb, and ²⁰⁸Pb are final products of major natural decay chains.
- Lead’s softness allows it to be scratched with a fingernail under ordinary conditions.
படங்கள்
பண்புகள்
இயற்பியல்
- அணு ஆரம் (சோதனைசார்)
- 180 pm அனைத்து தனிமங்களின் அணு ஆரம் (சோதனைசார்) ஒப்பிடுங்கள் →
- சகப்பிணைப்பு ஆரம்
- 146 pm அனைத்து தனிமங்களின் சகப்பிணைப்பு ஆரம் ஒப்பிடுங்கள் →
- வான் டெர் வால்ஸ் ஆரம்
- 202 pm அனைத்து தனிமங்களின் வான் டெர் வால்ஸ் ஆரம் ஒப்பிடுங்கள் →
- உலோக ஆரம்
- 150 pm அனைத்து தனிமங்களின் உலோக ஆரம் ஒப்பிடுங்கள் →
- அடர்த்தி
- 1.1342 × 104 kg/m³ அனைத்து தனிமங்களின் அடர்த்தி ஒப்பிடுங்கள் →
- மோலார் பருமன்
- 0.0183 L/mol
- STP இல் நிலை
- திடம் அனைத்து தனிமங்களின் STP இல் நிலை ஒப்பிடுங்கள் →
- உருகுநிலை
- 327.46 °C அனைத்து தனிமங்களின் உருகுநிலை ஒப்பிடுங்கள் →
- கொதிநிலை
- 1748.85 °C அனைத்து தனிமங்களின் கொதிநிலை ஒப்பிடுங்கள் →
- வெப்பக் கடத்துத்திறன்
- 35.3 W/(m·K) அனைத்து தனிமங்களின் வெப்பக் கடத்துத்திறன் ஒப்பிடுங்கள் →
- தன்வெப்ப ஏற்புத்திறன்
- 0.13 J/(g·K) அனைத்து தனிமங்களின் தன்வெப்ப ஏற்புத்திறன் ஒப்பிடுங்கள் →
- மோலார் வெப்ப ஏற்புத்திறன்
- 26.84 J/(mol·K) அனைத்து தனிமங்களின் மோலார் வெப்ப ஏற்புத்திறன் ஒப்பிடுங்கள் →
- படிக அமைப்பு
- முகப்பு மையக் கனசதுரம் அனைத்து தனிமங்களின் படிக அமைப்பு ஒப்பிடுங்கள் →
வேதியியல்
- எலக்ட்ரான் கவர்திறன் (பாலிங்)
- 2.33 அனைத்து தனிமங்களின் எலக்ட்ரான் கவர்திறன் (பாலிங்) ஒப்பிடுங்கள் →
- எலக்ட்ரான் கவர்திறன் (ஆலன்)
- 1.854
- எலக்ட்ரான் நாட்டம்
- 0.364 eV
- அயனியாக்க ஆற்றல் (1வது)
- 7.41668 eV அனைத்து தனிமங்களின் அயனியாக்க ஆற்றல் (1வது) ஒப்பிடுங்கள் →
- அயனியாக்க ஆற்றல் (2வது)
- 15.032551 eV அனைத்து தனிமங்களின் அயனியாக்க ஆற்றல் (2வது) ஒப்பிடுங்கள் →
- அயனியாக்க ஆற்றல் (3வது)
- 31.93741 eV அனைத்து தனிமங்களின் அயனியாக்க ஆற்றல் (3வது) ஒப்பிடுங்கள் →
- அயனியாக்க ஆற்றல் (4வது)
- 42.332706 eV அனைத்து தனிமங்களின் அயனியாக்க ஆற்றல் (4வது) ஒப்பிடுங்கள் →
- அயனியாக்க ஆற்றல் (5வது)
- 68.800237 eV அனைத்து தனிமங்களின் அயனியாக்க ஆற்றல் (5வது) ஒப்பிடுங்கள் →
- ஆக்சிஜனேற்ற நிலைகள்
- −4, −2, −1, 0, +1, +2, +3, +4 அனைத்து தனிமங்களின் ஆக்சிஜனேற்ற நிலைகள் ஒப்பிடுங்கள் →
- இணைதிறன் எலக்ட்ரான்கள்
- 4 அனைத்து தனிமங்களின் இணைதிறன் எலக்ட்ரான்கள் ஒப்பிடுங்கள் →
- எலக்ட்ரான் அமைப்பு
- [Xe] 6s2 4f14 5d10 6p2
வெப்ப இயக்கவியல்
- உருகுதல் வெப்பம்
- 0.04943774 eV அனைத்து தனிமங்களின் உருகுதல் வெப்பம் ஒப்பிடுங்கள் →
- ஆவியாதல் வெப்பம்
- 1.860393 eV அனைத்து தனிமங்களின் ஆவியாதல் வெப்பம் ஒப்பிடுங்கள் →
- பதங்கமாதல் வெப்பம்
- 2.023112 eV
- அணுவாக்க வெப்பம்
- 2.023112 eV
- அணுவாக்க என்தால்பி
- 2.023112 eV
அணுக்கரு
- புரோட்டான்கள்
- 82 அனைத்து தனிமங்களின் புரோட்டான்கள் ஒப்பிடுங்கள் →
- நியூட்ரான்கள்
- 126 அனைத்து தனிமங்களின் நியூட்ரான்கள் ஒப்பிடுங்கள் →
- அறியப்பட்ட ஐசோடோப்புகள்
- 43 அனைத்து தனிமங்களின் அறியப்பட்ட ஐசோடோப்புகள் ஒப்பிடுங்கள் →
- நிலையான ஐசோடோப்புகள்
- 0 அனைத்து தனிமங்களின் நிலையான ஐசோடோப்புகள் ஒப்பிடுங்கள் →
- மிக நிலையான ஐசோடோப்பு
- Pb-208
- கண்டுபிடிக்கப்பட்ட ஆண்டு
- 2021
மிகுதி
- மிகுதி (புவி மேலோடு)
- 14 mg/kg அனைத்து தனிமங்களின் மிகுதி (புவி மேலோடு) ஒப்பிடுங்கள் →
- மிகுதி (பெருங்கடல்)
- 3 × 10−5 mg/L அனைத்து தனிமங்களின் மிகுதி (பெருங்கடல்) ஒப்பிடுங்கள் →
படிக அமைப்பு
- அணிக்கோவை மாறிலி a
- 495 pm
எலக்ட்ரான் அமைப்பு
- ஒவ்வொரு கூட்டிலும் உள்ள எலக்ட்ரான்கள்
- 2, 8, 18, 32, 18, 4 அனைத்து தனிமங்களின் ஒவ்வொரு கூட்டிலும் உள்ள எலக்ட்ரான்கள் ஒப்பிடுங்கள் →
அடையாளங்காட்டிகள்
- CAS எண்
- 7439-92-1 அனைத்து தனிமங்களின் CAS எண் ஒப்பிடுங்கள் →
- நிறமாலை நிலைக் குறியீடு
- (1/2,1/2)0
- InChI
- InChI=1S/Pb
- InChI விசை
- WABPQHHGFIMREM-UHFFFAOYSA-N
எலக்ட்ரான் அமைப்பு அளவிடப்பட்டது
Pb: 4f¹⁴ 5d¹⁰ 6s² 6p²[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p²அணு மாதிரி
ஐசோடோப்புகள் நியூட்ரான் எண்ணிக்கை, நிறை மற்றும் நிலைத்தன்மையை மாற்றுகின்றன — மின்னூட்டமற்ற அணுவின் எலக்ட்ரான் அமைப்பை அல்ல.
விளக்க அணு மாதிரி; அளவிற்கு ஏற்ப இல்லை.
அணு அடையாளத் தடம்
உமிழ்வு / உறிஞ்சல் நிறமாலை
ஐசோடோப்புப் பரவல்
நிலையான ஐசோடோப்புகள் இல்லை.
| நிறை எண் | அணு நிறை (u) | இயற்கை மிகுதி | அரை ஆயுள் |
|---|---|---|---|
| 183 கதிரியக்கமுள்ளது | 182.991872 ± 0.00003 | கிடைக்கவில்லை | 535 ms |
| 184 கதிரியக்கமுள்ளது | 183.988136 ± 0.000014 | கிடைக்கவில்லை | 490 ms |
| 178 கதிரியக்கமுள்ளது | 178.003831 ± 0.000026 | கிடைக்கவில்லை | 250 us |
| 215 கதிரியக்கமுள்ளது | 215.00474 ± 0.00011 | கிடைக்கவில்லை | 142 வினாடிகள் |
| 204 கதிரியக்கமுள்ளது | 203.973044 ± 0.0000013 | 1.4000% | 140 Py |
கட்டம் / நிலை
காரணம்: உருகுநிலைக்குக் (327.46 °C) கீழ் 302.5 °C
விளக்க வரைபடம், அளவிற்கு ஏற்ப இல்லை
நிலை மாற்றப் புள்ளிகள்
நிலைமாற்ற ஆற்றல்கள்
உருகுநிலையில் 1 mol ஐ உருக்கத் தேவையான ஆற்றல்
கொதிநிலையில் 1 mol ஐ ஆவியாக்கத் தேவையான ஆற்றல்
பதங்கமாதல் நிலையில் 1 mol ஐப் பதங்கமாக்கத் தேவையான ஆற்றல்
அடர்த்தி
தரநிலை நிலைமைகளில்
தரநிலை நிலைமைகளில்
அணு நிறமாலைகள்
82 பதிவுகளில் 10 காட்டப்படுகின்றன. அயனி மின்னூட்டத்தின்படி ஏறுவரிசையில் வரிசைப்படுத்தப்பட்டுள்ளது.
நிறமாலைக் கோட்டுத் தரவுப் பதிவுகள் ?
| அயனி | மின்னூட்டம் | மொத்தக் கோடுகள் | நிலைமாற்ற நிகழ்தகவுகள் | மட்டக் குறியீடுகள் |
|---|---|---|---|---|
| Pb I | 0 | 135 | 28 | 135 |
| Pb II | +1 | 97 | 3 | 12 |
| Pb III | +2 | 41 | 0 | 0 |
| Pb IV | +3 | 92 | 0 | 0 |
| Pb V | +4 | 90 | 0 | 0 |
மட்டத் தரவுப் பதிவுகள் ?
| அயனி | மின்னூட்டம் | மட்டங்கள் |
|---|---|---|
| Pb I | 0 | 136 |
| Pb II | +1 | 95 |
| Pb III | +2 | 124 |
| Pb IV | +3 | 108 |
| Pb V | +4 | 45 |
| Pb VI | +5 | 2 |
| Pb VII | +6 | 2 |
| Pb VIII | +7 | 2 |
| Pb IX | +8 | 2 |
| Pb X | +9 | 2 |
அயனி ஆரங்கள்
12 பதிவுகளில் 10 காட்டப்படுகின்றன.
| மின்னூட்டம் | அணைவு | தற்சுழற்சி | ஆரம் |
|---|---|---|---|
| +2 | 4 | கிடைக்கவில்லை | 98 pm |
| +2 | 6 | கிடைக்கவில்லை | 119 pm |
| +2 | 7 | கிடைக்கவில்லை | 123 pm |
| +2 | 8 | கிடைக்கவில்லை | 129 pm |
| +2 | 9 | கிடைக்கவில்லை | 135 pm |
| +2 | 10 | கிடைக்கவில்லை | 140 pm |
| +2 | 11 | கிடைக்கவில்லை | 145 pm |
| +2 | 12 | கிடைக்கவில்லை | 149 pm |
| +4 | 4 | கிடைக்கவில்லை | 65 pm |
| +4 | 5 | கிடைக்கவில்லை | 73 pm |
சேர்மங்கள்
ஐசோடோப்புகள் (5)
| நிறை எண் | அணு நிறை (u) | இயற்கை மிகுதி | அரை ஆயுள் | சிதைவு முறை | |
|---|---|---|---|---|---|
| 183 கதிரியக்கமுள்ளது | 182.991872 ± 0.00003 | கிடைக்கவில்லை | 535 ms | α ≈100%β+ ? | |
| 184 கதிரியக்கமுள்ளது | 183.988136 ± 0.000014 | கிடைக்கவில்லை | 490 ms | α =80±1.1%β+ ? | |
| 178 கதிரியக்கமுள்ளது | 178.003831 ± 0.000026 | கிடைக்கவில்லை | 250 us | α ≈100%β+ ? | |
| 215 கதிரியக்கமுள்ளது | 215.00474 ± 0.00011 | கிடைக்கவில்லை | 142 வினாடிகள் | β- =100% | |
| 204 கதிரியக்கமுள்ளது | 203.973044 ± 0.0000013 | 1.4000% ± 0.1000% | 140 Py | IS =1.4±0.6%α ? |
நிறமாலைக் கோடுகள்
| அலைநீளம் (nm) | செறிவு | அயனியாக்க நிலை | வகை | நிலைமாற்றம் | துல்லியம் | மூலம் | |
|---|---|---|---|---|---|---|---|
| 401.96322 nm | 15000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.(2P*<1/2>).6d 2[5/2]* | அளவிடப்பட்டது | NIST | |
| 405.780659 nm | 95000 | Pb I | emission | 6s2.6p2 (3/2,1/2) → 6s2.6p.7s (1/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 406.213593 nm | 14000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.(2P*<1/2>).6d 2[3/2]* | அளவிடப்பட்டது | NIST | |
| 415.78144 nm | 10 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.9s (1/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 416.80327 nm | 10000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.(2P*<1/2>).6d 2[5/2]* | அளவிடப்பட்டது | NIST | |
| 434.041263 nm | 200 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.(2P*<1/2>).7d 2[3/2]* | அளவிடப்பட்டது | NIST | |
| 500.54165 nm | 1000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.7s (3/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 500.65724 nm | 100 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.9p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 507.6322 nm | 10 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.9p (1/2,1/2) | அளவிடப்பட்டது | NIST | |
| 508.94835 nm | 50 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.9p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 509.00083 nm | 20 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.9p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 510.72427 nm | 10 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.9p (1/2,1/2) | அளவிடப்பட்டது | NIST | |
| 520.14372 nm | 2000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.8s (1/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 569.23465 nm | 40 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.(2P*<1/2>).5f 2[5/2] | அளவிடப்பட்டது | NIST | |
| 589.56245 nm | 200 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 600.18624 nm | 2000 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 601.16667 nm | 500 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,3/2) | அளவிடப்பட்டது | NIST | |
| 605.93556 nm | 500 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,1/2) | அளவிடப்பட்டது | NIST | |
| 611.05203 nm | 50 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,1/2) | அளவிடப்பட்டது | NIST | |
| 623.52656 nm | 100 | Pb I | emission | 6s2.6p.7s (1/2,1/2)* → 6s2.6p.8p (1/2,1/2) | அளவிடப்பட்டது | NIST | |
| 689.2117 nm | 10 | Pb I | emission | 6s2.6p.7p (1/2,1/2) → 6s2.6p.(2P*<1/2>).10d 2[5/2]* | அளவிடப்பட்டது | NIST | |
| 712.893 nm | 5 | Pb I | emission | 6s2.6p.7p (1/2,1/2) → 6s2.6p.11s (1/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 722.89658 nm | 20000 | Pb I | emission | 6s2.6p2 (3/2,3/2) → 6s2.6p.7s (1/2,1/2)* | அளவிடப்பட்டது | NIST | |
| 730.46753 nm | 5 | Pb I | emission | 6s2.6p.7p (1/2,1/2) → 6s2.6p.(2P*<1/2>).9d 2[3/2]* | அளவிடப்பட்டது | NIST | |
| 733.0146 nm | 8 | Pb I | emission | 6s2.6p2 (3/2,1/2) → 6s2.6p2 (3/2,3/2) | அளவிடப்பட்டது | NIST | |
| 734.6676 nm | 10 | Pb I | emission | 6s2.6p.7p (1/2,1/2) → 6s2.6p.(2P*<1/2>).9d 2[5/2]* | அளவிடப்பட்டது | NIST |
விரிவான பண்புகள்
சகப்பிணைப்பு ஆரங்கள் (விரிவானவை)
- சகப்பிணைப்பு ஆரம் (பியுக்கோ)
- 144 pm
- சகப்பிணைப்பு ஆரம் (பியுக்கோ, இரட்டைப் பிணைப்பு)
- 135 pm
- சகப்பிணைப்பு ஆரம் (பியுக்கோ, முப்பிணைப்பு)
- 137 pm
வான் டெர் வால்ஸ் ஆரங்கள்
- Bondi
- 202 pm
- Batsanov
- 230 pm
- Alvarez
- 260 pm
- UFF
- 429.7 pm
- MM3
- 274 pm
அணு மற்றும் உலோக ஆரங்கள்
- அணு ஆரம் (ராம்)
- 249 pm
- உலோக ஆரம் (C12)
- 170 pm
எண்ணிடல் அளவுகோல்கள்
- Mendeleev
- 91
- Pettifor
- 82
- Glawe
- 82
எலக்ட்ரான் கவர்திறன் அளவுகோல்கள்
- Ghosh
- 0
- Miedema
- 4
- Gunnarsson–Lundqvist
- 4
- Robles–Bartolotti
- 4
முனைவாக்கத்திறன் மற்றும் நிறப்பிரிகை
- இருமுனை முனைவாக்கத்திறன்
- 47 a.u.
- இருமுனை முனைவாக்கத்திறன் (நிச்சயமின்மை)
- 3 a.u.
- C₆ (Gould–Bučko)
- 534 Ha·Bohr6
மீடெமா அளவுருக்கள்
- மீடெமா மோலார் பருமன்
- 18.28 cm3/mol
- மீடெமா எலக்ட்ரான் அடர்த்தி
- 2
விநியோக இடர் மற்றும் பொருளாதாரம்
- உற்பத்திக் குவிப்பு
- 44
- ஒப்பீட்டு விநியோக இடர்
- 6
- இருப்புப் பரவல்
- 34
- அரசியல் நிலைத்தன்மை (முன்னணி உற்பத்தியாளர்)
- 24
- அரசியல் நிலைத்தன்மை (அதிக இருப்புள்ள நாடு)
- 75
நிலை மாற்றங்கள் மற்றும் புறவேற்றுமை வடிவங்கள்
| உருகுநிலை | 600.61 K |
| கொதிநிலை | 2022.15 K |
ஆக்சிஜனேற்ற நிலை வகைகள்
மேம்பட்ட மேற்கோள் தரவுகள்
திரைமறைப்பு மாறிலிகள் (15)
| n | ஆர்பிட்டால் | σ |
|---|---|---|
| 1 | s | 1.5805 |
| 2 | p | 4.5234 |
| 2 | s | 21.57 |
| 3 | d | 13.4533 |
| 3 | p | 22.8505 |
| 3 | s | 23.8477 |
| 4 | d | 37.6804 |
| 4 | f | 38.0312 |
| 4 | p | 35.9664 |
| 4 | s | 35.1072 |
படிக ஆரங்களின் விவரங்கள் (12)
| மின்னூட்டம் | CN | தற்சுழற்சி | rcrystal (pm) | தோற்றம் |
|---|---|---|---|---|
| 2 | IVPY | 112 | calculated, | |
| 2 | VI | 133 | ||
| 2 | VII | 137 | calculated, | |
| 2 | VIII | 143 | calculated, | |
| 2 | IX | 149 | calculated, | |
| 2 | X | 154 | calculated, | |
| 2 | XI | 159 | calculated, | |
| 2 | XII | 163 | ||
| 4 | IV | 79 | estimated, | |
| 4 | V | 87 | estimated, |
ஐசோடோப்புச் சிதைவு முறைகள் (59)
| ஐசோடோப்பு | முறை | செறிவு |
|---|---|---|
| 178 | A | 100% |
| 178 | B+ | — |
| 179 | A | 100% |
| 180 | A | 100% |
| 181 | A | 100% |
| 181 | B+ | — |
| 182 | A | 100% |
| 182 | B+ | — |
| 183 | A | 100% |
| 183 | B+ | — |
X‑கதிர் சிதறல் காரணிகள் (516)
| ஆற்றல் (eV) | f₁ | f₂ |
|---|---|---|
| 10 | — | 4.6699 |
| 10.1617 | — | 4.72735 |
| 10.3261 | — | 4.78551 |
| 10.4931 | — | 4.84439 |
| 10.6628 | — | 4.83957 |
| 10.8353 | — | 4.83203 |
| 11.0106 | — | 4.82451 |
| 11.1886 | — | 4.817 |
| 11.3696 | — | 4.7889 |
| 11.5535 | — | 4.7596 |
கூடுதல் தரவுகள்
Estimated Crustal Abundance
The estimated element abundance in the earth's crust.
1.4×101 milligrams per kilogram
மேற்கோள்கள் (1)
Estimated Oceanic Abundance
The estimated element abundance in the earth's oceans.
3×10-5 milligrams per liter
மேற்கோள்கள் (1)
Sources
Sources of this element.
Lead is obtained chiefly from galena (PbS) by a roasting process. Anglesite, cerussite, and minim are other common lead minerals.
மேற்கோள்கள் (1)
- [6] Lead https://periodic.lanl.gov/82.shtml
Isotopes in Forensic Science and Anthropology
Information on the use of this element's isotopes in forensic science and anthropology.
Different geographic regions may have characteristic terrestrial lead isotopic compositions because of variations in the ages and chemical composition of the rocks and minerals in the local environment. Therefore, lead produced at a particular location can have a unique lead isotopic composition and it is possible to trace the history and origins of pollutants by measuring the relative amounts of the four stable isotopes of lead (208Pb, 207Pb, 206Pb, and 204Pb) (Fig. IUPAC.82.2) [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [548] T. J. Chow, J. L. Earl. Science169, 577 (1970).. Using isotopic abundance data, the source of this toxic metal can be identified as it moves through air and water and eventually to living systems [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002).. Scientists have analyzed lead in air pollution in California and found that it originated from Asia. Airborne particles from China have relatively higher amounts of 208Pb, which distinguishes the lead isotopic signature between airborne particles from Asia and North America. This knowledge could have implications in understanding the mixing of particles in the atmosphere and how pollutants are transported over vast distances [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002)., [550] S. A. Ewing, J. N. Christensen, S. T. Brown, R. A. Vancuren, S. S. Cliff, D. J. Depaolo. Environ. Sci. Technol.44, 8911 (2010)., [551] D. Krotz. Lead Isotopes Yield Clues to How Asian Air Pollution Reaches California, Lawrence Berkeley National Laboratory News Center (2014), Feb. 25; http://newscenter.lbl.gov/feature-stories/2010/12/01/lead-isotopes-air-pollution/.. Mapping the distribution of lead pollution by studying 204Pb, 206Pb, 207Pb and 208Pb also allows the identification of those human activities that contribute the highest amounts of lead to the environment [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000)., [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002)., [552] D. Cicchella, B. De Vivo, A. Lima, S. Albanese, R. A. R. McGill, R. R. Parrish. Geochem. Explor. Environ. Anal.8, 103 (2008)..
The measurement of the isotopic composition of lead in blood can help to determine the source of this toxic element in the body [553] R. H. Gwiazda, D. R. Smith. Environ. Health Perspect.108, 1091 (2000).. Lead is stored in bones and teeth. If a person moves to a different geographical region, the isotopic composition of the lead in the teeth is maintained, recording their place of origin. Bone can store lead for long periods of time (about 20 years), and some skeletal lead may be older and have a different isotopic composition than other skeletal lead. These differences reflect exposure to lead of different origins. By studying the isotope-amount ratio n(206Pb)/n(204Pb) and n(207Pb)/n(206Pb) in bone and teeth, it is possible to determine someone’s place of origin. For example, isotopes of lead were analyzed in the teeth and bones of a human mummy, known as the “Iceman”, to help determine his place of origin [554] B. L. Gulson, B. R. Gillings. Environ. Health Perspect.105, 820 (1997)., [555] W. Müller, H. Fricke, A. N. Halliday, M. T. McCulloch, J. A. Wartho. Science302, 862 (2003)..
210Pb is a relatively short-lived radioactive isotope of lead that is constantly produced by the decay of 222Rn in the atmosphere. While living, humans naturally incorporate 210Pb from the environment into bones and tissues. The amount of 210Pb in the body reaches equilibrium such that the 210Pb ingested is in equilibrium with the 210Pb that decays. When a person dies, this incorporation of 210Pb ceases and the relative amount of this isotope in the body decreases. Therefore, measurement of the 210Pb activity in a corpse can help determine time of death [556] D. R. Smith, J. D. Osterloh, A. R. Flegal. Environ. Health Perspect.104, 60 (1996)., [557] P. Rincon. “Isotopes could improve forensics”, in BBC News Online..
Lead isotope-amount ratios n(206Pb)/n(204Pb), n(207Pb)/n(204Pb), and n(208Pb)/n(204Pb)) along with isotope-amount ratio of silver, n(107Ag)/n(109Ag), and isotope-amount ratio of copper n(65Cu)/n(63Cu) have been used to determine the origin of European coins and to investigate the flow of goods in the world market over time [237] A. M. Desaulty, P. Telouk, E. Albalat, F. Albarede. Proc. Natl. Acad. Sci.108, 9002 (2011).. Metals from Peru and Mexico and those from European mining have distinct isotopic signatures that enable the origin of the metal to be determined by examining the isotopic compositions of silver, copper, and lead in the coins. Abundant silver sources mined in Mexico and Peru in the 16 th century were used to mint coins, but were not a major influence in the European coin market until the 18 th century [237] A. M. Desaulty, P. Telouk, E. Albalat, F. Albarede. Proc. Natl. Acad. Sci.108, 9002 (2011)..
மேற்கோள்கள் (13)
- [237] A. M. Desaulty, P. Telouk, E. Albalat, F. Albarede. Proc. Natl. Acad. Sci.108, 9002 (2011).
- [547] I. Renberg, M. L. Brännvall, R. Bindler, O. Emteryd. Ambio29, 150 (2000).
- [548] T. J. Chow, J. L. Earl. Science169, 577 (1970).
- [549] M. K. Reuer, D. J. Weiss. Math. Phys. Eng. Sci.360, 2889 (2002).
- [550] S. A. Ewing, J. N. Christensen, S. T. Brown, R. A. Vancuren, S. S. Cliff, D. J. Depaolo. Environ. Sci. Technol.44, 8911 (2010).
- [551] D. Krotz. Lead Isotopes Yield Clues to How Asian Air Pollution Reaches California, Lawrence Berkeley National Laboratory News Center (2014), Feb. 25; http://newscenter.lbl.gov/feature-stories/2010/12/01/lead-isotopes-air-pollution/.
- [552] D. Cicchella, B. De Vivo, A. Lima, S. Albanese, R. A. R. McGill, R. R. Parrish. Geochem. Explor. Environ. Anal.8, 103 (2008).
- [553] R. H. Gwiazda, D. R. Smith. Environ. Health Perspect.108, 1091 (2000).
- [554] B. L. Gulson, B. R. Gillings. Environ. Health Perspect.105, 820 (1997).
- [555] W. Müller, H. Fricke, A. N. Halliday, M. T. McCulloch, J. A. Wartho. Science302, 862 (2003).
- [556] D. R. Smith, J. D. Osterloh, A. R. Flegal. Environ. Health Perspect.104, 60 (1996).
- [557] P. Rincon. “Isotopes could improve forensics”, in BBC News Online.
- [4] IUPAC Periodic Table of the Elements and Isotopes (IPTEI) https://doi.org/10.1515/pac-2015-0703
மேற்கோள்கள்
(9)
Data deposited in or computed by PubChem
The half-life and atomic mass data was provided by the Atomic Mass Data Center at the International Atomic Energy Agency.
Element data are cited from the Atomic weights of the elements (an IUPAC Technical Report). The IUPAC periodic table of elements can be found at https://iupac.org/what-we-do/periodic-table-of-elements/. Additional information can be found within IUPAC publication doi:10.1515/pac-2015-0703 Copyright © 2020 International Union of Pure and Applied Chemistry.
The information are cited from Pure Appl. Chem. 2018; 90(12): 1833-2092, https://doi.org/10.1515/pac-2015-0703.
Thomas Jefferson National Accelerator Facility (Jefferson Lab) is one of 17 national laboratories funded by the U.S. Department of Energy. The lab's primary mission is to conduct basic research of the atom's nucleus using the lab's unique particle accelerator, known as the Continuous Electron Beam Accelerator Facility (CEBAF). For more information visit https://www.jlab.org/
The periodic table at the LANL (Los Alamos National Laboratory) contains basic element information together with the history, source, properties, use, handling and more. The provenance data may be found from the link under the source name.
The periodic table contains NIST's critically-evaluated data on atomic properties of the elements. The provenance data that include data for atomic spectroscopy, X-ray and gamma ray, radiation dosimetry, nuclear physics, and condensed matter physics may be found from the link under the source name. Ref: https://www.nist.gov/pml/atomic-spectra-database
This section provides all form of data related to element Lead.
The element property data was retrieved from publications.