Answer: einsteinium

AnswerCrossword Clue
EINSTEINIUMElement discovered in 1952
EINSTEINIUMElement named for famous scientist.
einsteiniuma radioactive element produced artificially
einsteiniumThe chemical element of atomic number 99, a radioactive metal of the actinide series. Einsteinium does not occur naturally and was discovered in 1953 in debris from the first hydrogen bomb explosion