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Moscovium
Moscovium,  115Mc
General properties
Pronunciation/mɒsˈkiəm/ (mos-KOH-vee-əm)
Mass number290 (most stable isotope)
Moscovium in the periodic table
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Bi

Mc

(Uhe)
fleroviummoscoviumlivermorium
Atomic number (Z)115
Groupgroup 15 (pnictogens)
Periodperiod 7
Blockp-block
Element category  unknown chemical properties, but probably a post-transition metal
Electron configuration[Rn] 5f14 6d10 7s2 7p3 (predicted)
Electrons per shell
2, 8, 18, 32, 32, 18, 5 (predicted)
Physical properties
Phase at STPMc: Unknown phase (predicted)
Melting point670 K ​(400 °C, ​750 °F) (predicted)
Boiling point~1400 K ​(~1100 °C, ​~2000 °F) (predicted)
Density (near r.t.)13.5 g/cm3 (predicted)
Heat of fusion5.90–5.98 kJ/mol (extrapolated)
Heat of vaporization138 kJ/mol (predicted)
Atomic properties
Oxidation states(+1), (+3) (predicted)
Ionization energies
  • 1st: 538.3 kJ/mol (predicted)
  • 2nd: 1760 kJ/mol (predicted)
  • 3rd: 2650 kJ/mol (predicted)
  • (more)
Atomic radiusempirical: 187 pm (predicted)
Covalent radius156–158 pm (extrapolated)
Other properties
Natural occurrenceMc: Synthetic
CAS Number54085-64-2
History
NamingAfter Moscow region
DiscoveryJoint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2003)
Main isotopes of moscovium
Iso­topeAbun­danceHalf-life (1/2)Decay modePro­duct
287Mcsyn37 msα283Nh
288Mcsyn164 msα284Nh
289Mcsyn330 msα285Nh
290Mcsyn650 msα286Nh
| references

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.

The element is named in honor of the Russian city of Moscow.

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