Einsteinium: the essentials
Einsteinium is radioactive rare earth metal named after Albert Einstein. It is of no commercial importance and only a few of its compounds are known.
Einsteinium: historical information
Einsteinium was identified by Ghiorso and others (Berkeley, California, USA) in 1952 in radioactive debris from the first large thermonuclear bomb explosion, which took place in the Pacific in November 1952. In 1961, a sufficient amount of einsteinium was produced to permit separation of a macroscopic amount of 253Es.
Einsteinium around us Read more »
Einsteinium has no biological role.
Einsteinium is a synthetic element that is not present in the geosphere.
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|Human||(no data) ppb by weight||(no data) atoms relative to C = 1000000|
Physical properties Read more »
- Density of solid: 13500 kg m-3
- Molar volume: 28.52 (seems high?) cm3
- Thermal conductivity: 10 (estimate) W m‑1 K‑1
Heat properties Read more »
- Melting point: 1133 [860 °C (1580 °F)] K
- Boiling point: (no data) K
- Enthalpy of fusion: (no data) kJ mol-1
Crystal structure Read more »
The solid state structure of einsteinium is: .
Einsteinium: orbital properties Read more »
Einsteinium atoms have 99 electrons and the shell structure is 22.214.171.124.29.8.2. The ground state electronic configuration of neutral Einsteinium is [Rn].5f11.7s2 and the term symbol of Einsteinium is 5I15/2.
- Pauling electronegativity: 1.3 (Pauling units)
- First ionisation energy: 619 kJ mol‑1
- Second ionisation energy: (no data) kJ mol‑1
Isolation: coming soon!
Einsteinium isotopes Read more »