Attribute | Darmstadtium × | Roentgenium × |
---|---|---|
1↓Discovered (year) | 1994 | 1994 |
Atomic number | 110 | 111 |
Group name | Transition metal | Transition metal |
Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹⁴6d⁸ (predicted) | [Rn]7s²5f¹⁴6d⁹ (predicted) |
Atomic mass (u) | 282.166 | 282.169 |
Standard state | Solid (expected) | Solid (expected) |
Symbol | Ds | Rg |