Atomic number:101

Group numbers:3

Period:7

Electronic configuration:[Rn] 5f¹³ 7s²

Formal oxidation number:+2 +3

Electronegativities:-

Atomic radius / pm:-

Relative atomic mass:[258]

 

Mendelevium was discovered by Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, and Glenn T. Seaborg (US) in 1955. Named in honour of Dimitri Mendeljejev, the Russian chemist who devised the periodic table. It is a synthetic radioactive metal. Mendelevium was made by bombarding einsteinium with helium ions.

Density / g dm^-3:-

Molar volume / cm³mol^-1:-

Electrical resistivity / μΩcm:- (20 °C)

Thermal conductivity / W m^-1K^-1:-

Melting point / °C:827

Boiling point / °C:-

Heat of fusion / kJ mol^-1:-

Heat of vaporization / kJ mol^-1:-

Heat of atomization / kJ mol^-1:116

1st ionization energy / kJ mol^-1:634.88

2nd ionization energy / kJ mol^-1:-

3rd ionization energy / kJ mol^-1:-

in the atmosphere / ppm:-

in the Earth's crust / ppm:-

in the oceans / ppm:-