Attribute | Meitnerium × | Nihonium × |
---|---|---|
Discovered (year) | 1982 | 2004 |
Atomic number | 109 | 113 |
Group name | Transition metal | Post-transition metal |
Oxidation states |
| - |
1↓Electron configuration | [Rn]7s²5f¹⁴6d⁷ (calculated) | [Rn]5f¹⁴6d¹⁰7s²7p¹ (predicted) |
Atomic mass (u) | 277.154 | 286.182 |
Standard state | Solid | Solid (expected) |
Symbol | Mt | Nh |