13 Facts About Einsteinium

Einsteinium is a synthetic element with the symbol Es and atomic number 99.

Einsteinium is a member of the actinide series and it is the seventh transuranium element.

Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.

Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form, and this was the common short-lived isotope einsteinium-253.

Einsteinium was first identified in December 1952 by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

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Einsteinium is a soft metal, with the bulk modulus of only 15 GPa, which value is one of the lowest among non-alkali metals.

Einsteinium has a high rate of nuclear fission that results in a low critical mass for a sustained nuclear chain reaction.

Einsteinium was theoretically observed in the spectrum of Przybylski's Star.

Einsteinium is produced in minute quantities by bombarding lighter actinides with neutrons in dedicated high-flux nuclear reactors.

Einsteinium is highly reactive and therefore strong reducing agents are required to obtain the pure metal from its compounds.

Einsteinium halides are known for the oxidation states +2 and +3.

Einsteinium bromide is a pale-yellow solid with a monoclinic structure of AlCl3 type, where the einsteinium atoms are octahedrally coordinated by bromine .

Einsteinium was incorporated into beta-diketone chelate complexes, since analogous complexes with lanthanides previously showed strongest UV-excited luminescence among metallorganic compounds.