Attribute | Darmstadtium × | Meitnerium × |
---|---|---|
Discovered (year) | 1994 | 1982 |
Atomic number | 110 | 109 |
Group name | Transition metal | Transition metal |
1↑Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹⁴6d⁸ (predicted) | [Rn]7s²5f¹⁴6d⁷ (calculated) |
Atomic mass (u) | 282.166 | 277.154 |
Standard state | Solid (expected) | Solid |
Symbol | Ds | Mt |