101 Md 258
Mendelevium
Actinide
Mendelevium (Md) is a chemical element with atomic number 101, classified as a actinide. At room temperature it is a solid. It was discovered in 1955 by Albert Ghiorso et al..
Properties
- Atomic number
- 101
- Atomic mass
- 258 u
- Category
- Actinide
- Group
- 0
- Period
- 7
- Block
- f-block
- Electron configuration
- [Rn] 5f¹³ 7s²
- Phase at STP
- Solid
- Density
- —
- Melting point
- 1100 K (826.9 °C)
- Boiling point
- —
- Electronegativity
- 1.3
- Atomic radius
- —
- Ionization energy
- 6.58 eV
- Discovery
- 1955 · Albert Ghiorso et al.
Common uses
Research only
Did you know?
Named after Dmitri Mendeleev, creator of the periodic table.