ELEMENTLE

Element 114 · Metal

Flerovium

Period 7 · Group 14

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.

Three reasons Flerovium stands out

  1. 1

    Named after Soviet physicist known for spontaneous fission, crystallography and material science.

  2. 2

    It is predicted to behave chemically more like a noble gas than a typical metal due to extreme relativistic electron effects.

  3. 3

    It was first synthesised in 1999 by a joint team of Russian and American scientists.

A metal that may behave almost like a noble gas

Flerovium honors the Flerov Laboratory of Nuclear Reactions. It lies below lead, yet relativistic stabilization of its electrons may make it unusually volatile and weakly reactive for a metal. Experiments are difficult to interpret because each atom survives only briefly before radioactive decay.

Flerovium at a glance
Atomic number / protons114
SymbolFl
Family (Elementle)Metal
Classification (PubChem)Post-transition metal
Period7
Group14
Atomic mass (u)290.192
Standard stateBulk state not experimentally established
Electron configuration[Rn]7s2 7p2 5f14 6d10 (predicted)
Reported oxidation states6, 4,2, 1, 0
Electronegativity (Pauling)Not available
Atomic radius (pm)Not available
First ionization energy (eV)Not available
Electron affinity (eV)Not available
Density (g/cm³)Not available
Melting pointNot available
Boiling pointNot available
Discovery (PubChem)1998

Values are reference data, not a specification for every temperature, pressure, or allotrope. Unknown properties are left unavailable. Superheavy-element predictions remain uncertain.

Sources & further reading

PubChem: Flerovium · Flerovium on Wikipedia

The introduction and original editorial story are adapted from Wikipedia contributors via Periodic-Table-JSON. Element descriptions and their adaptations are available under CC BY-SA 3.0. Numerical attributes use the PubChem periodic-table dataset, retrieved September 22, 2026.