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