The element mendelevium is named after the chemist Dmitri Mendeleev, who invented the periodic table. Mendelevium is produced in very small quantities by colliding parts of helium atoms into einsteinium atoms in a particle accelerator.

Summary of properties (Md)

Atomic weight[258]
Discoverer (year)Seaborg, Glenn T. (1955)
Natural formmetallic solid (-)
Electron configuration[Rn] 513 s2
Melting point (ºC)
Boiling point (ºC)
Abundance in earth's crust (ppm)synthetic
Isotope (abundance)
Density g/cm3
Van der Waals radius (pm)246
Covalent radius (pm)173
Electronegativity (Pauling)1.3
Vaporization enthalpy (kJ/mol)-
Enthalpy of fusion (kJ/mol)-
Specific heat capacity (J/g·K) at 25ºC and 1 atm-
Thermal conductivity (W/cm·K) at 25ºC and 1 atm-
Oxidation state+3, +2
Electron affinity (eV)
1st Ionization potential (eV)6.5800

Back to the Periodic Table of the Elements.