101 Md
Actinide
Mendelevium
Named after Mendeleev.
Properties of Mendelevium
- Atomic number (Z)
- 101
- Symbol
- Md
- Atomic mass
- 258 g/mol
- Category
- Actinide
- Group
- 3
- Period
- 7
- Electron configuration
- [Rn] 5f¹³ 7s²
- Electronegativity (Pauling)
- 1.3
- Atomic radius
- —
- First ionization energy
- 635 kJ/mol
- Melting point
- 1100 K (826.9 °C)
- Boiling point
- —
- Density
- —
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1955