Atomic number:99

Group numbers:3

Period:7

Electronic configuration:[Rn] 5f¹¹ 7s²

Formal oxidation number:+3

Electronegativities:-

Atomic radius / pm:186

Relative atomic mass:[252]

 

Einsteinium was discovered by Albert Ghiorso & Berkely Lab. (US) in 1952. Named in honour of Albert Einstein. It is a synthetic radioactive metal. Einsteinium was made by bombarding uranium with neutrons.

Density / g dm^-3:-

Molar volume / cm³mol^-1:-

Electrical resistivity / μΩcm:- (20 °C)

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

Melting point / °C:860

Boiling point / °C:-

Heat of fusion / kJ mol^-1:-

Heat of vaporization / kJ mol^-1:-

Heat of atomization / kJ mol^-1:150

1st ionization energy / kJ mol^-1:619.44

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:-