Attribute | Seaborgium × | Meitnerium × |
---|---|---|
Discovered (year) | 1974 | 1982 |
Atomic number | 106 | 109 |
1↑Group name | Transition metal | Transition metal |
Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹⁴6d⁴ | [Rn]7s²5f¹⁴6d⁷ (calculated) |
Atomic mass (u) | 269.128 | 277.154 |
Standard state | Solid | Solid |
Symbol | Sg | Mt |