Moscovium is a superheavy synthetic radioactive chemical element also known as eka-bismuth. It has the symbol Mc and the atomic number 115. Moscovium does not exist in nature. It is made from a fusion reaction between americium and calcium.
Quick Facts Pronunciation, Mass number ...
Moscovium, 00Mc|
Pronunciation | (mos-SKOH-vee-əm) |
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Mass number | [290] |
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Group | group 15 (pnictogens) |
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Period | period 7 |
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Block | p-block |
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Electron configuration | [Rn] 5f14 6d10 7s2 7p3 (predicted)[1] (predicted) |
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Electrons per shell | 2, 8, 18, 32, 32, 18, 5 (predicted) |
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Phase at STP | solid (predicted)[1] |
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Melting point | 670 K (400 °C, 750 °F) (predicted)[1][2] |
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Boiling point | ~1400 K (~1100 °C, ~2000 °F) (predicted)[1] |
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Density (near r.t.) | 13.5 g/cm3 (predicted)[2] |
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Heat of fusion | 5.90–5.98 kJ/mol (extrapolated)[3] |
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Heat of vaporization | 138 kJ/mol (predicted)[2] |
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Oxidation states | (+1), (+3) (predicted)[1][4] |
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Ionization energies | - 1st: 538.3 kJ/mol (predicted)[5]
- 2nd: 1760 kJ/mol (predicted)[2]
- 3rd: 2650 kJ/mol (predicted)[2]
- (more)
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Atomic radius | empirical: 187 pm (predicted)[1][2] |
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Covalent radius | 156–158 pm (extrapolated)[3] |
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Natural occurrence | synthetic |
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CAS Number | 54085-64-2 |
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Naming | After Moscow region |
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Discovery | Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2003) |
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Main isotopes |
Decay |
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abundance |
half-life (t1/2) |
mode |
product |
286Mc |
synth |
20 ms[6] |
α |
282Nh |
287Mc |
synth |
38 ms |
α |
283Nh |
288Mc |
synth |
193 ms |
α |
284Nh |
289Mc |
synth |
250 ms[7][8] |
α |
285Nh |
290Mc |
synth |
650 ms[7][8] |
α |
286Nh |
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Category: Moscovium | references |
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The element is named in honor of the Russian city of Moscow.
Moscovium is in or near the center of the theoretical island of stability. No stable isotopes of moscovium have yet been found. The most stable isotope with 184 neutrons is 299Mc. The isotope that has been made has only 175 neutrons (290Mc).