Atomic number 112
Cn
Copernicium
- Cn
- Cn
- + phase
- − phase
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Shells are a teaching model: an electron does not travel on a ring at a fixed distance.
- Category
- Transition metal
- Period
- 7
- Group
- 12
- Block
- d
- Atomic mass
- 286.179 Da (copernicium-286, estimated)
- Electron configuration
- [Rn] 5f14 6d10 7s2 (predicted)
- Phase at 25 °C
- solid (predicted)
Neighbours in the table
Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| Atomic number | 112 | ||
| Atomic mass | 286.179 Da | Da | PubChem, copernicium-286, estimated |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 (predicted) | ||
| Phase at 25 °C | solid (predicted) |
This element has no standard atomic weight; the atomic mass shown is PubChem's, that of copernicium-286, and no isotope of it is established as the longest-lived.
That mass is an estimate by the IAEA's Atomic Mass Data Center, not a measurement.
The electron configuration and the phase of this element are predictions, not measurements.