Moscovium (Mc)
post-transition-metalExpected to be a Solid
Peso atomico standard
[289]Configurazione elettronica
[Rn] 7s2 7p3 5f14 6d10 (Previsto)Punto di fusione
396,85 °CPunto di ebollizione
1126,85 °CDensità
1,35e+4 kg/m³Stati di ossidazione
+1, +3Elettronegatività (Pauling)
N/DEnergia di ionizzazione (1ª)
N/DAnno della scoperta
2004Raggio atomico
187 pmDettagli
Moscovium is a synthetic transactinide element in group 15, below bismuth. It has been made only atom by atom in heavy-ion fusion experiments, and all confirmed isotopes are highly radioactive and short-lived. Its chemistry has not been directly characterized in bulk; relativistic calculations predict a very heavy p-block metal with chemistry differing from lighter pnictogens, probably favoring the +1 and +3 oxidation states more than a stable +5 state.
Moscovium does not occur naturally in the Earth’s crust. The name moscovium and the symbol Mc, are the accepted ones for element 115. The name is in recognition of the Moscow region and honors the ancient Russian land that is home to the Joint Institute for Nuclear Research (JIRN), where the discovery experiments were conducted using the Dubna gas filled recoil separator in combination with the heavy ion accelerator capabilities of the Flerov Laboratory of Nuclear Reactions.
48Ca and 243Am were bombarded together in a cyclotron during a series of experiments from 14 July to 10 August 2003 (Fig. IUPAC.115.1). In February 2004, the results from these experiments were released in a report that stated “ununpentium” had been synthesized. This initial name means “115” in the IUPAC systematic naming scheme, which combines Latin and Greek names to produce un-un-pentium for 115. Moscovium has no known isotopic applications aside from scientific research.
On February 2, 2004, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory and Oak Ridge National Laboratory, announced the creation of moscovium. In experiments performed between July 14, 2003 and August 10, 2003, atoms of americium-243 were bombarded with ions of calcium-48 using a device called a cyclotron. This produced one atom of moscovium-287 and three atoms of moscovium-288. All four atoms quickly decayed into other elements. Moscovium's most stable isotope, moscovium-289, has a half-life of about 220 milliseconds. It decays into nihonium-285 through alpha decay.
On Novemer 28th, 2016, element 115 was named Moscovium with the symbol Mc. Moscovium is the Moscow region of Russia, which is home to much of Russia’s superheavy element research. Muscovium was discovered by together by the Joint Institute for Nuclear Research, Dubna (Russia), Oak Ridge National Laboratory (USA), Vanderbilt University (USA) and Lawrence Livermore National Laboratory (USA).
No macroscopic sample of moscovium has ever been prepared, so its appearance is unknown. Calculations usually treat it as a dense metallic solid under ordinary conditions, but color, texture, melting point, and other bulk properties remain predicted rather than observed.
Moscovium has no practical commercial, industrial, medical, or consumer use. Its only use is in nuclear research, where individual atoms and their decay chains test models of superheavy-element stability, nuclear shell effects, and alpha-decay systematics. Moscovium isotopes are also important as links in decay chains leading to other superheavy nuclides, including nihonium produced by alpha decay of moscovium.
Since only a few atoms of moscovium have ever been produced, it currently has no uses outside of basic scientific research.
No confirmed compound of moscovium has been isolated or chemically characterized. Predictions place it in the pnictogen family but with strong relativistic effects that may make its valence behavior unlike that of nitrogen, phosphorus, arsenic, antimony, and bismuth. The +1 oxidation state is expected to be comparatively important, and +3 may also be accessible; +5 is predicted to be less stable. Hypothetical species such as moscovium(I) chloride, McCl, and moscovium(III) chloride, McCl₃, are discussed in theoretical chemistry only.
See more information at the Moscovium compound page.
The safety hazards of moscovium are dominated by radioactivity, not conventional chemical toxicity. Known isotopes decay mainly by alpha emission and spontaneous fission pathways within very short times, with isotope-specific half-lives. Quantities produced are far below macroscopic handling amounts, but any experiment requires heavy-element radiochemistry controls, shielding appropriate to decay products, and contamination prevention.
Moscovium has no confirmed natural occurrence and no environmental cycle. Atoms produced in laboratories decay rapidly to daughter nuclides, so persistence as moscovium in air, water, soil, or organisms is not expected. Any environmental relevance would be limited to controlled accelerator facilities and the management of radioactive targets, residues, and decay products.
Moscovium has no commodity market, no industrial supply chain, and no recoverable stock. It is produced only in specialized accelerator experiments by bombarding rare actinide targets with heavy ions, for example using americium targets and calcium beams. The limiting factors are accelerator time, target preparation, nuclear reaction cross sections, detector capability, and radiological controls, not ordinary mining, refining, demand, or substitution economics.
Made by bombarding americium-243 with calcium-48.
Moscovium is not expected to have a lasting natural cosmic abundance. Any atoms formed in energetic nucleosynthesis or high-energy particle events would decay quickly compared with astronomical timescales. It has not been identified in stars, meteorites, planets, or interstellar material; its significance is mainly as a laboratory probe of the superheavy region near predicted nuclear shell stabilization.
- The first published moscovium decay chains were produced using ²⁴³Am targets and ⁴⁸Ca projectiles.
- Its name refers to the Moscow region, recognizing the role of the Joint Institute for Nuclear Research in Dubna.
- Moscovium isotopes can decay to nihonium by alpha emission.
- Only a few atoms are needed to establish a decay chain, but repeated events are required for confident assignment.
- Its periodic-table position suggests group 15 chemistry, yet relativistic effects are expected to be large.
Immagini
Proprietà
Fisiche
- Raggio atomico (empirico)
- 187 pm Confronta Raggio atomico (empirico) di tutti gli elementi →
- Densità
- 1,35 × 104 kg/m³ Confronta Densità di tutti gli elementi →
- Fase in condizioni STP
- Solido Confronta Fase in condizioni STP di tutti gli elementi →
- Punto di fusione
- 396,85 °C Confronta Punto di fusione di tutti gli elementi →
- Punto di ebollizione
- 1126,85 °C Confronta Punto di ebollizione di tutti gli elementi →
Chimiche
- Affinità elettronica
- 0,3 eV
- Stati di ossidazione
- +1, +3 Confronta Stati di ossidazione di tutti gli elementi →
- Elettroni di valenza
- 5 Confronta Elettroni di valenza di tutti gli elementi →
- Configurazione elettronica
- [Rn] 7s2 7p3 5f14 6d10 (Previsto)
Termodinamiche
N/D
Nucleari
- Protoni
- 115 Confronta Protoni di tutti gli elementi →
- Neutroni
- 177 Confronta Neutroni di tutti gli elementi →
- Isotopi noti
- 6 Confronta Isotopi noti di tutti gli elementi →
- Isotopi stabili
- 0 Confronta Isotopi stabili di tutti gli elementi →
- Numero di massa (isotopo più stabile)
- 289
- Isotopo più stabile
- Mc-292
- Anno della scoperta
- 2004
Abbondanza
N/D
Struttura cristallina
N/D
Struttura elettronica
- Elettroni per guscio
- 14, 10, 5 Confronta Elettroni per guscio di tutti gli elementi →
Identificativi
- Numero CAS
- 54085-64-2 Confronta Numero CAS di tutti gli elementi →
- InChI
- InChI=1S/Mc
- Chiave InChI
- QDXZEHQJHSHEQF-UHFFFAOYSA-N
Configurazione elettronica Previsto
——Dati sulla configurazione elettronica non disponibili per questo ione.
Modello atomico
Gli isotopi modificano il numero di neutroni, la massa e la stabilità — non la configurazione elettronica di un atomo neutro.
N/D
Modello atomico schematico, non in scala.
Impronta atomica
Spettro di emissione / assorbimento
Distribuzione isotopica
Nessun isotopo stabile.
| Numero di massa | Massa atomica (u) | Abbondanza naturale | Emivita |
|---|---|---|---|
| 290 Radioattivo | 290,19598 ± 0,00073 | N/D | 840 ms |
| 289 Radioattivo | 289,19363 ± 0,00089 | N/D | 410 ms |
| 288 Radioattivo | 288,19274 ± 0,00062 | N/D | 177 ms |
| 287 Radioattivo | 287,1907 ± 0,00052 | N/D | 60 ms |
| 292 Radioattivo | 292,200323 ± 0,000751 | N/D | 5 secondi |
Fase / Stato
Motivo: 371,9 °C sotto il punto di fusione (396,85 °C)
Schema non in scala
Punti di transizione di fase
Densità
In condizioni standard
In condizioni standard
Dati sulla struttura cristallina non disponibili
Isotopi (5)
| Numero di massa | Massa atomica (u) | Abbondanza naturale | Emivita | Modalità di decadimento | |
|---|---|---|---|---|---|
| 290 Radioattivo | 290,19598 ± 0,00073 | N/D | 840 ms | α =100% | |
| 289 Radioattivo | 289,19363 ± 0,00089 | N/D | 410 ms | α =100% | |
| 288 Radioattivo | 288,19274 ± 0,00062 | N/D | 177 ms | α =100% | |
| 287 Radioattivo | 287,1907 ± 0,00052 | N/D | 60 ms | α =100% | |
| 292 Radioattivo | 292,200323 ± 0,000751 | N/D | 5 secondi | α ?SF ? |
Proprietà estese
Raggi covalenti (dati estesi)
- Raggio covalente (Pyykkö)
- 162 pm
Scale di numerazione
- Mendeleev
- 98
Polarizzabilità e dispersione
- Polarizzabilità dipolare
- 71 a.u.
- Polarizzabilità dipolare (inc.)
- 20 a.u.
Dati di riferimento avanzati
Modalità di decadimento degli isotopi (8)
| Isotopo | Modalità | Intensità |
|---|---|---|
| 287 | A | 100% |
| 288 | A | 100% |
| 289 | A | 100% |
| 290 | A | 100% |
| 291 | A | — |
| 291 | SF | — |
| 292 | A | — |
| 292 | SF | — |
Dati aggiuntivi
Estimated Crustal Abundance
The estimated element abundance in the earth's crust.
Not Applicable
Riferimenti (1)
- [5] Moscovium https://education.jlab.org/itselemental/ele115.html
Estimated Oceanic Abundance
The estimated element abundance in the earth's oceans.
Not Applicable
Riferimenti (1)
- [5] Moscovium https://education.jlab.org/itselemental/ele115.html
Riferimenti
(8)
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.
This section provides all form of data related to element Moscovium.