Moscovium (Mc)

Isotopes of Moscovium

Isotope Atomic Mass Half-life Mode of Decay
Mc-287 287 0.0466 seconds  α to Nh-283 
Mc-288  288 0.0186-0.280 seconds  α to Nh-284


Experimental results reported in 2004 involving the bombardment of Americium-243 with Calcium-48 ions are consistent with the formation in the laboratory of a few atoms of elements 113 and 115. In experiments conducted at the Joint Institute for Nuclear Research in Dubna, Russian Federation, observed atomic decay patterns were said to confirm the existence of element 113 and element 115. In these decay chains, element 113 (now known as nihonium) would be produced via the α-decay of element 115. The name moscovium recognizes the Moscow region and honors the Russian area that is the home of the Joint Institute for Nuclear Research, where 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.

Properties of Moscovium

Name Moscovium
Symbol Mc
Atomic number 115
Atomic weight [288]
Standard state Presumably a solid at 298 °K
CAS Registry ID  54085-64-2 
Group in periodic table  15 
Group name Pnictogen 
Period in periodic table
Block in periodic table  p-block 
Color  Unknown, but probably metallic and silvery white or grey in appearance 
Classification Metallic 
Melting point No data available
Boiling point  No data available
Density of solid  13 g/cm3 (predicted) 
Electron configuration [Rn]5f146d107s27p3 (predicted)

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