Symbol	Cn
Atomic number	112
Group	12 (Zinc group)
Period	7
Block	d
Classification	Transition Metal

Appearance	-
Color	-

Number of protons	112 p+
Number of neutrons	173 n0
Number of electrons	112 e-

From Wikipedia, the free encyclopediaCopernicium is a chemical element with symbol Cn and atomic number 112. It is an extremely radioactive synthetic element that can only be created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of approximately 29 seconds, but it is possible that this copernicium isotope may have a nuclear isomer with a longer half-life, 8.9 min.

Phase at STP	Gas
Density	23.7 g/cm3
Atomic weight	285 u

Melting point	-
Boiling point	3570 K 3296.85 °C 5966.33 °F
Heat of vaporization	-

Electronegativity (Pauling Scale)	-
Electron affinity	-
Oxidation states	0, (+1), +2, (+4) (parenthesized: prediction)
Ionization energies	1154.9 kJ/mol 2170.0 kJ/mol 3164.7 kJ/mol 4245.4 kJ/mol 5499.7 kJ/mol

Electron configuration Shorthand configuration	[Rn] 5f14 6d10 7s2
Electron configuration Full configuration	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2
Electron configuration chart	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2
Electrons per shell	2, 8, 18, 32, 32, 18, 2
Valence electrons
Valency electrons
Bohr model	Figure: Shell diagram of Copernicium (Cn) atom.
Orbital Diagram 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s

Discovery

Gesellschaft für Schwerionenforschung (1996)

CAS Number	54084-26-3
ChemSpider ID	-
EC number	-
PubChem CID Number	135476785