Copernicium

Atomic number

112

Atomic mass (u)

286.179

Category

Transition metal

Standard state

Expected to be a Solid

Melting point

Not reported

Boiling point

Not reported

Density (g/cm³)

Not reported in this source

Electronegativity (Pauling)

Not reported in this source

Electron configuration

[Rn]7s2 5f14 6d10 (predicted)

Oxidation states

2, 1, 0

Atomic radius (pm)

Not reported in this source

First ionization energy (eV)

Not reported in this source

Discovery & recognition

Discovery year / period (PubChem)

1996

Discovery credited to (RSC)

Sigurd Hofmann and colleagues

Date or period recorded by RSC

1996

Discovery place

Darmstadt, Germany

An ancient date does not identify a first human discovery. Different references may date observation, isolation and formal recognition differently.

Natural occurrence & production

This transuranium element is primarily produced through nuclear reactions in reactors or particle accelerators. Some transuranium elements also occur naturally in extremely small traces; that is different from a mineable deposit.

“Copernicium is a man-made element of which only a few atoms have ever been made.”

Royal Society of Chemistry · occurrence excerpt ↗

Continue the research

Reference values are not product specifications. Blank values have not been estimated. For superheavy elements, some properties and family assignments are theoretical or incompletely measured.