Attribute | Roentgenium × | Nihonium × |
---|---|---|
Discovered (year) | 1994 | 2004 |
Atomic number | 111 | 113 |
Group name | Transition metal | Post-transition metal |
Oxidation states |
| - |
1↓Electron configuration | [Rn]7s²5f¹⁴6d⁹ (predicted) | [Rn]5f¹⁴6d¹⁰7s²7p¹ (predicted) |
Atomic mass (u) | 282.169 | 286.182 |
Standard state | Solid (expected) | Solid (expected) |
Symbol | Rg | Nh |