#99 - Einsteinium - Es

Einsteinium

Name	Einsteinium
Symbol	Es
Atomic Number	99
Atomic Mass	252.0 atomic mass units
Number of Protons	99
Number of Neutrons	153
Number of Electrons	99
Melting Point	860.0° C
Boiling Point	Unknown
Density	Unknown
Normal Phase	Synthetic
Family	Rare Earth Metals
Period	7
Cost	Not enough has been produced to sell.

Origin of Name	After Albert Einstein
Date and Place of Discovery	First synthesized early in December 1952 at the University of California at Berkeley and at the Los Alamos National Laboratory
Discovered by	Albert Ghiorso (University of California, Berkeley) Gregory R. Choppin (Los Alamos National Laboratory)
Common Compounds	Einsteinium bromide (EsBr₂) Einsteinium chloride (EsCl₂ ) Einsteinium fluoride (EsF₃) Einsteinium iodide (EsI₂ ) Einsteinium oxide (Es₂O₃)
Interesting facts	Ghiorso and Choppin by were analyzing debris from the first hydrogen bomb test of November 1952 during Operation Ivy when they discovered this element. About .01 milligrams of einsteinium was synthesized in 1961 to produce mendelevium. Another 3 milligrams was produced over a four year period at the Oak Ridge National Laboratory's High Flux Isotope Reactor in Tennessee.
Common Uses	There are no known uses except for basic scientific research.

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Einsteinium Atomic Structure

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