Neon (Ne)
noble-gasGas
Masse atomique relative standard
20,1797 uConfiguration électronique
[He] 2s2 2p6Point de fusion
-248,59 °CPoint d’ébullition
-246,05 °CMasse volumique
0,8999 kg/m³États d’oxydation
0Électronégativité (Pauling)
N/DÉnergie d’ionisation (1re)
21,564541 eVAnnée de découverte
1898Rayon atomique
160 pmDétails
Neon is a noble gas and the second lightest member of group 18. It is monatomic, colorless, and chemically very inert under ordinary conditions because its outer electron shell is closed. In the atmosphere it is present only as a minor constituent, but it is readily recognized by the intense reddish-orange light emitted in low-pressure electrical discharges. Its technological importance rests mainly on this optical behavior and on its cryogenic properties.
Colourless gaseous element of group 18 on the periodic table (noble gases). Neon occurs in the atmosphere, and comprises 0.0018% of the volume of the atmosphere. It has a distinct reddish glow when used in discharge tubes and neon based lamps. It forms almost no chemical compounds. Neon was discovered in 1898 by Sir William Ramsey and M.W. Travers.
The name derives from the Greek neos for "new". It was discovered from its bright orange spectral lines by the Scottish chemist William Ramsay and the English chemist Morris William Travers in 1898 from a liquefied air sample.
Neon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist, shortly after their discovery of the element krypton in 1898. Like krypton, neon was discovered through the study of liquefied air. Although neon is the fourth most abundant element in the universe, only 0.0018% of the earth's atmosphere is neon.
From the Greek word neos, new. Discovered by Ramsay and Travers in 1898. Neon is a rare gaseous element present in the atmosphere to the extent of 1 part in 65,000 of air. It is obtained by liquefaction of air and separated from the other gases by fractional distillation.
Pure neon is a colorless, odorless, monatomic gas at ordinary temperature and pressure. When cooled below its boiling point it becomes a colorless cryogenic liquid, and at still lower temperature a solid. In a discharge tube it emits a bright red-orange glow from atomic emission lines.
Neon is best known for luminous advertising signs, indicator lamps, and decorative discharge tubes, where low-pressure neon gives a distinctive red-orange emission. Other gases or phosphors are used for many colors often called “neon” in commerce. Neon is also used in some high-voltage indicators, gas lasers such as helium-neon lasers, and specialized cryogenic applications. Liquid neon has a high refrigeration capacity per unit volume, but its cost limits broad use.
The largest use for neon gas is in advertising signs. Neon is also used to make high voltage indicators and is combined with helium to make helium-neon lasers. Liquid neon is used as a cryogenic refrigerant. Neon is highly inert and forms no known compounds, although there is some evidence that it could form a compound with fluorine.
Although neon advertising signs account for the bulk of its use, neon also functions in high-voltage indicators, lightning arrestors, wave meter tubes, and TV tubes. Neon and helium are used in making gas lasers. Liquid neon is now commercially available and is finding important application as an economical cryogenic refrigerant.
Isotopes in Earth/Planetary Science
Neon is subject to stable isotopic fractionation by physical processes, such as exchange between gas, liquid, and solid phases. Small variations in the isotope-amount ratio n(22Ne)/n(20Ne) have been used to examine gas-liquid exchange processes during groundwater recharge (water moving downward from the surface) and discharge [29] M. Ozima, F. A. Podosek. Noble Gas Geochemistry: 2nd Edition, p. 286, Cambridge University Press, Cambridge, UK (2002)., [101] Noble Gases in Geochemistry and Cosmochemistry: Reviews in Mineralogy and Geochemistry, D. Porcelli, C. J. Ballentine, and R. Wieler (Eds.), p. 844, Mineralogical Society of America and the Geochemical Society, Washington, DC (2002)., [102] F. Peeters, U. Beyerle, W. Aeschbach-Hertig, J. Holocher, M. S. Brennwald, R. Kipfer. Geochim. Cosmochim. Acta.67, 587 (2003)..
Isotopes in Geochronology
Some 21Ne and 22Ne form naturally in the Earth’s crust largely by reactions of 18O and 19F in minerals with neutrons and alpha particles emitted from uranium and thorium decay, called nucleogenic neon isotopes [29] M. Ozima, F. A. Podosek. Noble Gas Geochemistry: 2nd Edition, p. 286, Cambridge University Press, Cambridge, UK (2002)., [101] Noble Gases in Geochemistry and Cosmochemistry: Reviews in Mineralogy and Geochemistry, D. Porcelli, C. J. Ballentine, and R. Wieler (Eds.), p. 844, Mineralogical Society of America and the Geochemical Society, Washington, DC (2002).. In addition, neon isotopes can form at the surface of the Earth and in extraterrestrial bodies by cosmic-ray-induced spallation reactions on magnesium, silicon, aluminum, and sodium [103] T. E. Cerling, H. Craig. Annu. Rev. Earth Planet. Sci.22, 273 (1994)., [104] D. Lal, B. Peters. “Cosmic ray produced radioactivity on the earth”, in Cosmic Rays II, K. Sitte (Ed.), Springer-Verlag, New York (1967).. Analyses of all three stable neon isotopes may be used to distinguish these sources from primordial neon. The relative amounts of atmospheric neon and crustal nucleogenic neon isotopes in deep groundwaters and natural gases have been used in studies of solid-water-gas interactions and migration (Fig. IUPAC.10.1). The cosmogenic component is mainly detected in 21Ne and can be used to determine cosmic-ray exposure ages of rock samples, including meteorites exposed during travel through space and boulders exposed by melting of glacial ice (Fig. IUPAC.10.1).
Isotopes in Industry
Masers (Microwave Amplification by Stimulated Emission of Radiation) containing 20Ne have been used to study quantum physics. 21Ne may also play a role in maser studies of quantum physics [106] W. R. Bennett. Phys. Rev.126, 580 (1962)..
Isotopes Used as a Source of Radioactive Isotope(s)
22Ne is used to produce the radioisotope 22Na via the reaction 22Ne (p, n) 22Na [107] R. Policroniades, E. Moreno, A. Varela, G. Murillo, A. Huerta, M. E. Ortiz, E. Chávez. Rev. Mex. Fis. S.54, 46 (2008).. 20Ne has been used to produce the radioisotope 18F via the reaction 20Ne (d, 4He) 18F [107] R. Policroniades, E. Moreno, A. Varela, G. Murillo, A. Huerta, M. E. Ortiz, E. Chávez. Rev. Mex. Fis. S.54, 46 (2008)..
Neon has no stable neutral compounds known under ordinary chemical conditions. Its very high ionization energy and negligible electron affinity make conventional oxidation states chemically inaccessible. Laboratory studies have identified transient ionic or weakly bound species such as NeH⁺ and van der Waals complexes at low temperature or in plasmas, but these are not isolable bulk compounds. Neon clathrate hydrates have been reported only under suitable low-temperature, high-pressure conditions, where neon is physically trapped rather than chemically bonded.
Neon is a very inert element, however, it has been reported to form a compound with fluorine. It is still questionable if true compounds of neon exist, but evidence is mounting in favor of their existence. The ions, Ne+, (NeAr)+, (NeH)+, and (HeNe+) are known from optical and mass spectrometric studies. Neon also forms an unstable hydrate.
See more information at the Neon compound page.
Neon is not toxic and is not chemically reactive in normal use. The main hazards are physical: compressed gas cylinders can rupture if mishandled, and released gas can displace oxygen in confined spaces. Liquid neon and cold equipment can cause cryogenic burns and embrittle some materials. Discharge devices also involve electrical hazards and, in some cases, fragile glass under reduced pressure.
Atmospheric neon is chemically persistent and does not participate significantly in biological or geochemical reactions. It enters the air mainly from primordial atmospheric inventory and minor natural releases from rocks and waters; it is lost only slowly by atmospheric escape processes. Because it is inert, dilute, and nonbioaccumulative, neon has no known essential biological role and little direct ecological activity.
Commercial neon is obtained by fractional distillation of liquefied air, usually as a minor by-product of large oxygen and nitrogen production. Its low atmospheric abundance makes recovery more specialized than for argon, and purification requires separation from helium, hydrogen, and other light gases. Demand is concentrated in signage, electronics, lasers, and niche cryogenic uses. Recycling is possible from closed systems but is uncommon for small lamps and signs, so supply depends strongly on industrial gas infrastructure.
Obtained from production of liquid air as a byproduct of producing liquid oxygen and nitrogen.
Neon is a cosmically abundant light noble gas made chiefly during stellar nucleosynthesis in massive stars, especially through carbon and oxygen burning stages. It is found in the Sun, stellar atmospheres, nebulae, and planetary atmospheres, although its abundance in rocky planets is reduced by volatility and atmospheric loss. Several stable isotopes occur naturally, with ²⁰Ne dominant on Earth.
- The familiar red-orange sign color is produced by neon itself, not by a coating.
- Many commercial “neon” signs of other colors contain argon, mercury vapor, or phosphors instead.
- Neon was discovered through the fractional distillation of liquid air.
- Liquid neon is denser than liquid helium but boils at a much higher temperature.
- Neon has no known stable neutral compound at ambient conditions.
- The name comes from a Greek word meaning “new.”
Images
Propriétés
Propriétés physiques
- Rayon atomique (empirique)
- 160 pm Comparer : Rayon atomique (empirique) de tous les éléments →
- Rayon covalent
- 58 pm Comparer : Rayon covalent de tous les éléments →
- Rayon de van der Waals
- 154 pm Comparer : Rayon de van der Waals de tous les éléments →
- Masse volumique
- 0,8999 kg/m³ Comparer : Masse volumique de tous les éléments →
- Volume molaire
- 0,0168 L/mol
- Phase aux CNTP
- Gaz Comparer : Phase aux CNTP de tous les éléments →
- Point de fusion
- -248,59 °C Comparer : Point de fusion de tous les éléments →
- Point d’ébullition
- -246,05 °C Comparer : Point d’ébullition de tous les éléments →
- Capacité thermique massique
- 1,03 J/(g·K) Comparer : Capacité thermique massique de tous les éléments →
- Capacité thermique molaire
- 20,786 J/(mol·K) Comparer : Capacité thermique molaire de tous les éléments →
- Structure cristalline
- Cubique à faces centrées Comparer : Structure cristalline de tous les éléments →
Propriétés chimiques
- Électronégativité (Allen)
- 4,787
- Affinité électronique
- -1,2 eV (valeur négative — l'atome ne devrait pas lier d'électron supplémentaire)
- Énergie d’ionisation (1re)
- 21,564541 eV Comparer : Énergie d’ionisation (1re) de tous les éléments →
- Énergie d’ionisation (2e)
- 40,963111 eV Comparer : Énergie d’ionisation (2e) de tous les éléments →
- Énergie d’ionisation (3e)
- 63,423518 eV Comparer : Énergie d’ionisation (3e) de tous les éléments →
- Énergie d’ionisation (4e)
- 97,190335 eV Comparer : Énergie d’ionisation (4e) de tous les éléments →
- Énergie d’ionisation (5e)
- 126,247435 eV Comparer : Énergie d’ionisation (5e) de tous les éléments →
- États d’oxydation
- 0 Comparer : États d’oxydation de tous les éléments →
- Électrons de valence
- 8 Comparer : Électrons de valence de tous les éléments →
- Configuration électronique
- [He] 2s2 2p6
Propriétés thermodynamiques
- Point triple (température)
- -248,59 °C
- Point triple (pression)
- 4,34e+4 Pa
- Point critique (température)
- -228,658 °C
- Point critique (pression)
- 2,6786e+6 Pa
- Enthalpie de fusion
- 0,00347204 eV Comparer : Enthalpie de fusion de tous les éléments →
- Enthalpie de vaporisation
- 0,01772296 eV Comparer : Enthalpie de vaporisation de tous les éléments →
- Enthalpie d’atomisation
- 0 eV
Propriétés nucléaires
- Protons
- 10 Comparer : Protons de tous les éléments →
- Neutrons
- 10 Comparer : Neutrons de tous les éléments →
- Isotopes connus
- 20 Comparer : Isotopes connus de tous les éléments →
- Isotopes stables
- 3 Comparer : Isotopes stables de tous les éléments →
- Isotope le plus stable
- Ne-20
- Année de découverte
- 1898
Abondance
- Abondance (croûte terrestre)
- 0,005 mg/kg Comparer : Abondance (croûte terrestre) de tous les éléments →
- Abondance (océan)
- 1,2 × 10−4 mg/L Comparer : Abondance (océan) de tous les éléments →
Structure cristalline
- Paramètre de maille a
- 443 pm
Structure électronique
- Électrons par couche
- 2, 8 Comparer : Électrons par couche de tous les éléments →
Identifiants
- Numéro CAS
- 7440-01-9 Comparer : Numéro CAS de tous les éléments →
- Symbole de terme
- 1S0
- InChI
- InChI=1S/Ne
- Clé InChI
- GKAOGPIIYCISHV-UHFFFAOYSA-N
Configuration électronique Mesuré
Ne: 2s² 2p⁶[He] 2s² 2p⁶1s² 2s² 2p⁶Modèle atomique
Les isotopes diffèrent par leur nombre de neutrons, leur masse et leur stabilité — pas par la configuration électronique de l’atome neutre.
Modèle atomique schématique, non à l’échelle.
Empreinte atomique
Spectre d’émission / d’absorption
Distribution isotopique
| Nombre de masse | Masse atomique (u) | Abondance naturelle | Demi-vie |
|---|---|---|---|
| 20 Stable | 19,9924401762 ± 0,0000000017 | 90,4800% | Stable |
| 21 Stable | 20,993846685 ± 0,000000041 | 0,2700% | Stable |
| 22 Stable | 21,991385114 ± 0,000000018 | 9,2500% | Stable |
Phase / État
Explication: 271,1 °C au-dessus du point d’ébullition (-246,05 °C)
Schématique, non à l’échelle
Points de transition de phase
Énergies de transition
Énergie nécessaire pour faire fondre 1 mol au point de fusion
Énergie nécessaire pour vaporiser 1 mol au point d’ébullition
Masse volumique
Dans les conditions standard
Estimée par la loi des gaz parfaits à la température actuelle
Données avancées
Spectres atomiques
Raies répertoriées ?
| Ion | Charge | Nombre total de raies | Probabilités de transition | Désignations des niveaux |
|---|---|---|---|---|
| Ne I | 0 | 1597 | 533 | 1597 |
| Ne II | +1 | 1914 | 233 | 1912 |
| Ne III | +2 | 910 | 637 | 910 |
| Ne IV | +3 | 643 | 72 | 643 |
| Ne V | +4 | 374 | 139 | 374 |
| Ne VI | +5 | 515 | 449 | 515 |
| Ne VII | +6 | 661 | 442 | 661 |
| Ne VIII | +7 | 745 | 540 | 745 |
| Ne IX | +8 | 229 | 228 | 229 |
| Ne X | +9 | 137 | 137 | 137 |
Niveaux répertoriés ?
| Ion | Charge | Niveaux |
|---|---|---|
| Ne I | 0 | 375 |
| Ne II | +1 | 385 |
| Ne III | +2 | 283 |
| Ne IV | +3 | 215 |
| Ne V | +4 | 161 |
| Ne VI | +5 | 135 |
| Ne VII | +6 | 208 |
| Ne VIII | +7 | 178 |
| Ne IX | +8 | 110 |
| Ne X | +9 | 149 |
Composés
Isotopes (3)
Natural neon is a mixture of three isotopes. Six other unstable isotopes are known.
| Nombre de masse | Masse atomique (u) | Abondance naturelle | Demi-vie | Mode de désintégration | |
|---|---|---|---|---|---|
| 20 Stable | 19,9924401762 ± 0,0000000017 | 90,4800% ± 0,0300% | Stable | stable | |
| 21 Stable | 20,993846685 ± 0,000000041 | 0,2700% ± 0,0100% | Stable | stable | |
| 22 Stable | 21,991385114 ± 0,000000018 | 9,2500% ± 0,0300% | Stable | stable |
Raies spectrales
Affichage de 50 sur 1087. Seules les raies spectrales dont l’intensité a été mesurée sont affichées par défaut.
| Longueur d’onde (nm) | Intensité | Degré d’ionisation | Type | Transition | Précision | Source | |
|---|---|---|---|---|---|---|---|
| 692.94673 nm | 100000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<3/2>).3p 2[3/2] | Mesurée | NIST | |
| 703.24131 nm | 85000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[1/2] | Mesurée | NIST | |
| 717.39381 nm | 77000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<3/2>).3p 2[5/2] | Mesurée | NIST | |
| 724.51666 nm | 77000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[1/2] | Mesurée | NIST | |
| 743.88984 nm | 60000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<3/2>).3p 2[1/2] | Mesurée | NIST | |
| 702.40504 nm | 34000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<3/2>).3p 2[3/2] | Mesurée | NIST | |
| 748.88712 nm | 32000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).3d 2[3/2]* | Mesurée | NIST | |
| 540.05618 nm | 20000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 585.24879 nm | 20000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 640.22472 nm | 20000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[5/2] | Mesurée | NIST | |
| 470.43948 nm | 15000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).5d 2[3/2]* | Mesurée | NIST | |
| 471.20625 nm | 15000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).6d 2[5/2]* | Mesurée | NIST | |
| 471.53441 nm | 15000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).6d 2[7/2]* | Mesurée | NIST | |
| 650.65281 nm | 15000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[5/2] | Mesurée | NIST | |
| 470.88584 nm | 12000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).5d 2[1/2]* | Mesurée | NIST | |
| 453.77551 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<1/2>).5d 2[3/2]* | Mesurée | NIST | |
| 471.00638 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).5d 2[1/2]* | Mesurée | NIST | |
| 478.89249 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).7s 2[3/2]* | Mesurée | NIST | |
| 482.73382 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).6s 2[3/2]* | Mesurée | NIST | |
| 488.49181 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<1/2>).5d 2[5/2]* | Mesurée | NIST | |
| 495.70324 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).5d 2[5/2]* | Mesurée | NIST | |
| 534.10932 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).4d 2[1/2]* | Mesurée | NIST | |
| 588.18952 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 602.99969 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 607.43377 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[1/2] | Mesurée | NIST | |
| 614.30626 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[3/2] | Mesurée | NIST | |
| 616.35939 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 621.72812 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[3/2] | Mesurée | NIST | |
| 626.6495 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<1/2>).3p 2[3/2] | Mesurée | NIST | |
| 633.44278 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[5/2] | Mesurée | NIST | |
| 638.29917 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<3/2>).3p 2[3/2] | Mesurée | NIST | |
| 659.89529 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3s 2[1/2]* → 2s2.2p5.(2P*<1/2>).3p 2[1/2] | Mesurée | NIST | |
| 705.91074 nm | 10000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<1/2>).3d 2[3/2]* | Mesurée | NIST | |
| 576.44189 nm | 7000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).4d 2[7/2]* | Mesurée | NIST | |
| 533.07771 nm | 6000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).4d 2[3/2]* | Mesurée | NIST | |
| 534.3282 nm | 6000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).4d 2[1/2]* | Mesurée | NIST | |
| 597.5534 nm | 6000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3s 2[3/2]* → 2s2.2p5.(2P*<1/2>).3p 2[3/2] | Mesurée | NIST | |
| 475.27311 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).6d 2[7/2]* | Mesurée | NIST | |
| 479.02171 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).6d 2[5/2]* | Mesurée | NIST | |
| 483.73128 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[1/2] → 2s2.2p5.(2P*<3/2>).6s 2[3/2]* | Mesurée | NIST | |
| 489.20896 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[3/2] → 2s2.2p5.(2P*<3/2>).7s 2[3/2]* | Mesurée | NIST | |
| 500.51582 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).5d 2[5/2]* | Mesurée | NIST | |
| 503.77504 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).5d 2[7/2]* | Mesurée | NIST | |
| 514.49371 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).5d 2[5/2]* | Mesurée | NIST | |
| 514.50308 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<1/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).5d 2[5/2]* | Mesurée | NIST | |
| 556.27668 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<1/2>).4d 2[5/2]* | Mesurée | NIST | |
| 565.66578 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).4d 2[5/2]* | Mesurée | NIST | |
| 571.92256 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[3/2] → 2s2.2p5.(2P*<1/2>).4d 2[5/2]* | Mesurée | NIST | |
| 574.82979 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).4d 2[5/2]* | Mesurée | NIST | |
| 580.44496 nm | 5000 | Ne I | emission | 2s2.2p5.(2P*<3/2>).3p 2[5/2] → 2s2.2p5.(2P*<3/2>).4d 2[5/2]* | Mesurée | NIST |
Propriétés étendues
Rayons covalents (données étendues)
- Rayon covalent (Pyykkö)
- 67 pm
- Rayon covalent (Pyykkö, liaison double)
- 96 pm
Rayons de van der Waals
- Bondi
- 154 pm
- Alvarez
- 158 pm
- UFF
- 324,3 pm
- MM3
- 160 pm
Rayons atomiques et métalliques
- Rayon atomique (Rahm)
- 156 pm
Échelles de numérotation
- Mendeleev
- 113
- Pettifor
- 2
- Glawe
- 2
Échelles d’électronégativité
- Ghosh
- 0
- Gunnarsson–Lundqvist
- 7
- Robles–Bartolotti
- 7
Polarisabilité et dispersion
- Polarisabilité dipolaire
- 2,6611 a.u.
- Polarisabilité dipolaire (incertitude)
- 0 a.u.
- C₆
- 6,2 Ha·Bohr6
- C₆ (Gould–Bučko)
- 6,91 Ha·Bohr6
Affinité chimique
- Affinité protonique
- 198,8 kJ/mol
- Basicité en phase gazeuse
- 174,4 kJ/mol
Propriétés des gaz nobles
Transitions de phase et allotropes
| Point de fusion | 24,56 K |
| Point d’ébullition | 27,1 K |
| Point critique (température) | 44,49 K |
| Point critique (pression) | 2,68 MPa |
| Point triple (température) | 24,56 K |
| Point triple (pression) | 43,37 kPa |
Données de référence avancées
Constantes d’écran (3)
| n | Orbitale | σ |
|---|---|---|
| 1 | s | 0,3579 |
| 2 | p | 4,2416 |
| 2 | s | 4,2416 |
Modes de désintégration des isotopes (35)
| Isotope | Mode | Intensité |
|---|---|---|
| 15 | 2p | 100% |
| 16 | 2p | 100% |
| 17 | B+ | 100% |
| 17 | B+p | 94,4% |
| 17 | B+A | 3,5% |
| 17 | B+pA | 0% |
| 18 | B+ | 100% |
| 19 | B+ | 100% |
| 23 | B- | 100% |
| 24 | B- | 100% |
Facteurs de diffusion des rayons X (503)
| Énergie (eV) | f₁ | f₂ |
|---|---|---|
| 10 | — | 0 |
| 10,1617 | — | 0 |
| 10,3261 | — | 0 |
| 10,4931 | — | 0 |
| 10,6628 | — | 0 |
| 10,8353 | — | 0 |
| 11,0106 | — | 0 |
| 11,1886 | — | 0 |
| 11,3696 | — | 0 |
| 11,5535 | — | 0 |
Données complémentaires
Estimated Crustal Abundance
The estimated element abundance in the earth's crust.
5×10-3 milligrams per kilogram
Références (1)
Estimated Oceanic Abundance
The estimated element abundance in the earth's oceans.
1.2×10-4 milligrams per liter
Références (1)
Références
(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 Neon.
The element property data was retrieved from publications.