Below you can find the 1 amu or atomic mass unit is 1/12 of the mass of an atom of this element Jeopardy Words Answer. The answer to 1 amu or atomic mass unit is 1/12 of the mass of an atom of this element has 6 letters. This clue belongs to the Chemistry category and is part of Jeopardy Word Level 2546. If you scroll near the bottom you will find other clues and answers part of level 2546