Attribute | Bohrium × | Meitnerium × |
---|---|---|
Discovered (year) | 1976 | 1982 |
1↑Atomic number | 107 | 109 |
Group name | Transition metal | Transition metal |
Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹⁴6d⁵ | [Rn]7s²5f¹⁴6d⁷ (calculated) |
Atomic mass (u) | 270.133 | 277.154 |
Standard state | Solid | Solid |
Symbol | Bh | Mt |