112 Cn 285
Copernicium
transition metal
Properties
- Atomic number
- 112
- Atomic mass
- 285 u
- Category
- transition metal
- Group
- 12
- Period
- 7
- Block
- d-block
- State (room temp)
- Liquid
- Outer-shell electrons
- 2
- Electronegativity
- —
- Density
- 14 g/cm³
- Melting point
- —
- Boiling point
- 3296.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰
Noble-gas shorthand: [Rn] 5f¹⁴ 6d¹⁰ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 18, 2 — that's 2 in the outermost shell.
About Copernicium
Copernicium 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.
- Discovered by Gesellschaft für Schwerionenforschung
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.