Md
Mendelevium
Element 101 · Actinide · Period 7, Group 15
Solid · Discovered 1955
Atomic Properties
| Atomic Number | 101 |
| Atomic Mass | 258.09843u |
| Electron Configuration | [Rn]7s2 5f13 |
| Electronegativity | 1.3Pauling |
| Ionization Energy | 6.58eV |
| Oxidation States | +3, +2 |
Physical Properties
| Standard State | Solid |
| Melting Point | 1100K |
| Group Block | Actinide |
| Year Discovered | 1955 |