Mendelevium

Actinide · 258.09843 u · group 3, period 7

Mendelevium · Md

Atomic number101

SymbolMd

CategoryActinide

Standard stateSolid

Group · Period · Block3 · 7 · f

Electron configuration[Rn]7s2 5f13

Atomic mass258.09843 u

Atomic radius—

Protons / Neutrons / Electrons101 / 157 / 101

Shells (e⁻ per shell)2, 8, 18, 32, 31, 8, 2

Electronegativity (Pauling)1.3

Ionization energy6.58 eV

Electron affinity—

Oxidation states+3, +2

Melting point1.10e+3 K · 826.9 °C

Boiling point—

Density—

Year discovered1955

CPK color

#B30DA6

State at room temp (25 °C)

solid

Position