About

Livermorium is named after the Lawrence Livermore National Laboratory in California, which collaborated with the JINR in Dubna, Russia, on its discovery. It is a synthetic, super-heavy element with a half-life measured in tens of milliseconds. It is predicted to be a chalcogen, similar to polonium, but its properties are based entirely on theoretical calculations.

Atomic Properties

Atomic Number116

Atomic Weight293 u

Neutrons (common)177

Electron Configuration[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴

Full Configuration1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁴

Electrons per Shell2, 8, 18, 32, 32, 18, 6

Electron Affinity74.9 kJ/mol

Oxidation States-2, +2, +4

Covalent Radius175 pm

Periodic Table Position

Group16

Period7

BlockP

Chemical SeriesPost-transition metals

Physical Properties

State at STPsolid

Magnetic Orderingdiamagnetic

Thermal Properties

Melting Point709 K

Boiling Point1,085 K

Heat of Fusion7.5 kJ/mol

Heat of Vaporization46 kJ/mol

Discovery

Discovered byJoint Institute for Nuclear Research, Lawrence Livermore National Laboratory

Discovery Year2,000

Occurrencesynthetic

CAS Number54100-71-9

Electron Configuration

Energy

↿⇂

1s

↿⇂

2s

↿⇂

2p

↿⇂

3s

↿⇂

3p

↿⇂

4s

↿⇂

3d

↿⇂

4p

↿⇂

5s

↿⇂

4d

↿⇂

5p

↿⇂

6s

↿⇂

4f

↿⇂

5d

↿⇂

6p

↿⇂

7s

↿⇂

5f

↿⇂

6d

↿⇂

↿

7p

Isotopes of Livermorium

Symbol ▲	Mass (u) ▲	Abundance ▲	Half-life ▲	Decay Mode ▲
²⁹³Lv	293.204490	—	70 ms	Alpha Decay