About

Moscovium is a synthetic, super-heavy element named for the Moscow Oblast, where the Joint Institute for Nuclear Research (JINR) is located. It was created in collaboration between Russian and American scientists. It is extremely radioactive, with a half-life of less than a second, and its limited production precludes any use outside of fundamental scientific study of heavy nuclei.

Atomic Properties

Atomic Number115

Atomic Weight290.196 u

Neutrons (common)175

Electron Configuration[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³

Full Configuration1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d¹⁰ 7s² 7p³

Electrons per Shell2, 8, 18, 32, 32, 18, 5

Electronegativity1.3

Electron Affinity35.3 kJ/mol

Oxidation States+3, +1

Covalent Radius162 pm

Periodic Table Position

Group15

Period7

BlockP

Chemical SeriesPost-transition metals

Physical Properties

State at STPsolid

Magnetic Orderingparamagnetic

Thermal Properties

Melting Point670 K

Boiling Point1,100 K

Heat of Fusion5.9 kJ/mol

Heat of Vaporization138 kJ/mol

Discovery

Discovered byJoint Institute for Nuclear Research, Lawrence Livermore National Laboratory

Discovery Year2,003

Occurrencesynthetic

CAS Number54085-64-2

Electron Configuration

Energy

↿⇂

1s

↿⇂

2s

↿⇂

2p

↿⇂

3s

↿⇂

3p

↿⇂

4s

↿⇂

3d

↿⇂

4p

↿⇂

5s

↿⇂

4d

↿⇂

5p

↿⇂

6s

↿⇂

4f

↿⇂

5d

↿⇂

6p

↿⇂

7s

↿⇂

5f

↿⇂

6d

↿

7p

Isotopes of Moscovium

Symbol ▲	Mass (u) ▲	Abundance ▲	Half-life ▲	Decay Mode ▲
²⁸⁹Mc	289.193630	—	410 ms	Alpha Decay