Below you can find the A compound of this lightest metal has been found effective in treating manic-depressives Jeopardy Words Answer. The answer to A compound of this lightest metal has been found effective in treating manic-depressives has 7 letters. This clue belongs to the Metals category and is part of Jeopardy Word Level 756. If you scroll near the bottom you will find other clues and answers part of level 756