Below you can find the Einsteinium & this element symbol fm were first produced in a 1952 thermonuclear explosion Jeopardy Words Answer. The answer to Einsteinium & this element symbol fm were first produced in a 1952 thermonuclear explosion has 7 letters. This clue belongs to the The elements category and is part of Jeopardy Word Level 900. If you scroll near the bottom you will find other clues and answers part of level 900