Dy	Ho	Er
Cf	Es	Fm

Einsteinium - ₉₉Es: historical information

Discoveror: Workers at Argonne, Los Alamos, USA, and the University of California at Berkeley, USA.
Place of discovery: USA
Date of discovery: 1952
Origin of name : named after "Albert Einstein".

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 - 99Es: historical information

Einsteinium - ₉₉Es: historical information