Mendelevium
Actinide| Atomic number | 101 |
|---|---|
| Category | Actinide |
| Atomic mass | 258 |
| Electron configuration | [Rn]5f¹³ 7s² |
| Oxidation states | +3 |
| Electronegativity | 1.3 |
| Melting point | 827 °C |
| Crystal structure | Unknown |
| Period | 7 |
| Block | f |
| Discovered | 1,955 |
| Crustal abundance | 0 ppm |