101Md258.09843
Mendelevium
Actinide
Solid at STP
Period 7Block FDiscovered 1955
[Rn]7s2 5f13
Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 101 |
| Atomic Mass | 258.09843 u |
| Electron Configuration | [Rn]7s2 5f13 |
| Oxidation States | +3, +2 |
| Electronegativity | 1.3 (Pauling) |
| Ionization Energy | 6.58 eV |
| Block | F |
Physical Properties
| Standard State | Solid |
| Melting Point | 1100 K (826.9 °C) |
| CPK Color | #B30DA6 |
Classification
| Category | Actinide |
| Group Block | Actinide |
| Period | 7 |
| Block | F |
Discovery
| Year Discovered | 1955 |
| Discovered By | Lawrence Berkeley National Laboratory |
| Electron Shells | 2, 8, 18, 32, 31, 8, 2 |