Einsteinium
Videos
Einsteinium is a synthetic chemical element; it has symbol Es and atomic number 99 and is a member of the actinide series and the seventh transuranium element.
A vial of solid einsteinium-253 glowing due to its own intense radiation
Einsteinium was first observed in the fallout from the Ivy Mike nuclear test.
The element was discovered by a team headed by Albert Ghiorso.
The element was named after Albert Einstein.
Fermium
Videos
Fermium is a synthetic chemical element; it has symbol Fm and atomic number 100. It is an actinide and the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the
Einsteinium
…atoms, however, could absorb two additional neutrons (for a total of 17), resulting in 255Es, as well as in the 255Fm isotope of another new element, fermium. The discovery of the new elements and the associated new data on multiple neutron capture were initially kept secret on the orders of the U.S. military…
The element was named after Enrico Fermi.