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