Mendelevium was discovered by Albert Ghiorso, Glenn T. Seaborg, Gregory R. Choppin, Bernard G. Harvey, and Stanley G. Thompson in 1955 at the University of California, Berkeley.
Name: Mendelevium
Symbol: Md
Atomic number: 101
Atomic weight: 258.10
State: solid
Group, period, block: n/a, 7, f
Color: unknown
Classification: actinide
Electron configuration: 5f13 7s2
2,8,18,32,31,8,2
Physical properties
Density: no data
Melting point: 1100 K,827 °C,1521 °F
Boiling point: no data
Atomic properties
Oxidation states: 2, 3
Electronegativity: 1.3 (Pauling scale)
Ionization energies: 1st: 635 kJ·mol-1
Covalent radius: no data
Van der Waals radius: no data
- Md
Electron Configuration
Isotopes
Mendelevium has no stable isotopes. The first isotope to be discovered was 256Md in 1955.