Attribute | Copernicium × | Roentgenium × |
---|---|---|
Discovered (year) | 1996 | 1994 |
Atomic number | 112 | 111 |
Group name | Transition metal | Transition metal |
1↓Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹⁴6d¹⁰ (predicted) | [Rn]7s²5f¹⁴6d⁹ (predicted) |
Atomic mass (u) | 286.179 | 282.169 |
Standard state | Solid (expected) | Solid (expected) |
Symbol | Cn | Rg |