Name: einsteinium
Symbol: Es
Atomic number: 99
Atomic weight: [ 252 ]
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
CAS registry ID: 7429-92-7
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.