Copernicium
unknown, probably transition metal · period 7 · group 12 · d-block
Copernicium is a synthetic chemical element with the symbol Cn and atomic number 112. Its known isotopes are extremely radioactive, and have only been created in a laboratory.
What the numbers say
At standard temperature and pressure Copernicium is a gas, sitting in period 7, group 12 of the d-block.
First identified in 1996.
Check it against computed structures
The structure search queries the Materials Project, OQMD and the Open Materials Database for computed crystal structures containing Cn — with DFT formation energy, hull stability and band gap where the provider publishes them.
K 2 · L 8 · M 18 · N 32 · O 32 · P 18 · Q 2
Properties
| Atomic number | 112 |
|---|---|
| Atomic mass | 285 u |
| Series | unknown, probably transition metal |
| Group | 12 |
| Period | 7 |
| Block | d-block |
| Phase at STP | Gas |
| Boiling point | 3570 K (3297 °C) |
| Electron configuration | *[Rn] 5f¹⁴ 6d¹⁰ 7s² |
| Discovered | 1996 |
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See Cn in context with all 118 elements.
Working with copernicium in a real design?
Ask the materials chat how Cn behaves in your alloy system, what it does to weldability, and which grades to look at — with the source of every number named.