About

Flerovium is named after the Flerov Laboratory of Nuclear Reactions in Dubna, Russia, and its founder Georgy Flyorov. It is a super-heavy synthetic element located near the theoretical 'island of stability,' where super-heavy elements are predicted to have longer half-lives. It is expected to be a volatile metal, possibly showing some noble-gas-like properties.

Atomic Properties

Atomic Number114

Atomic Weight289.19 u

Neutrons (common)175

Electron Configuration[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²

Full Configuration1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d¹⁰ 7s² 7p²

Electrons per Shell2, 8, 18, 32, 32, 18, 4

Electronegativity1.9

Electron Affinity18.5 kJ/mol

Oxidation States+4, +2, 0

Covalent Radius143 pm

Periodic Table Position

Group14

Period7

BlockP

Chemical SeriesPost-transition metals

Physical Properties

State at STPgas

Crystal Structurefcc

Magnetic Orderingdiamagnetic

Thermal Properties

Melting Point200 K

Boiling Point210 K

Heat of Fusion7.5 kJ/mol

Heat of Vaporization16.3 kJ/mol

Discovery

Discovered byJoint Institute for Nuclear Research, Lawrence Livermore National Laboratory

Discovery Year1,998

Occurrencesynthetic

CAS Number54085-16-4

Electron Configuration

Energy

↿⇂

1s

↿⇂

2s

↿⇂

2p

↿⇂

3s

↿⇂

3p

↿⇂

4s

↿⇂

3d

↿⇂

4p

↿⇂

5s

↿⇂

4d

↿⇂

5p

↿⇂

6s

↿⇂

4f

↿⇂

5d

↿⇂

6p

↿⇂

7s

↿⇂

5f

↿⇂

6d

↿

7p

Isotopes of Flerovium

Symbol ▲	Mass (u) ▲	Abundance ▲	Half-life ▲	Decay Mode ▲
²⁸⁹Fl	289.190420	—	2.1 s	Alpha Decay