114
Fl
Flerovium
289
Flerovium (Fl)
Post-Transition MetalGroup 14Period 7p-block-blockRadioactive
Flerovium is a superheavy artificial chemical element with symbol Fl and atomic number 114. It is an extremely radioactive synthetic element. The element is named after the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research in Dubna, Russia, where the element was discovered in 1998.
Latin name: Flerovium
Atomic Number
114
Atomic Mass
289 g/mol
Phase (STP)
Solid (predicted)
Electron Config.
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² (predicted)
General
SymbolFl
Atomic Number114
Atomic Mass289 g/mol
CategoryPost-Transition Metal
Group14
Period7
Blockp-block
Electron Configuration[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² (predicted)
Valence Electrons14
Colourunknown (predicted metallic)
Physical Properties
Phase (STP)Solid (predicted)
Densitypredicted ~14 g/cm3
Melting Pointpredicted ~700 K
Boiling Pointpredicted ~1400 K
Atomic Properties
Oxidation States+2, +4
Ion ChargeFl2+/Fl4+
Nuclear & Hazards
RadioactiveYes
Half-life2.6 seconds (Fl-289)
Abundance
In Earth's Crust0%
Discovery & History
Discovery Year1998
Discovered ByJoint Institute for Nuclear Research (Dubna) and collaborators
Country of DiscoveryRussia
Isotopes of Flerovium
| Isotope | Abundance | Half-life | Decay |
|---|---|---|---|
| Fl-287 | — | ~0.51 seconds | α |
| Fl-289 | — | ~2.6 seconds | α |