Below you can find the A noble gas not superman's home planet the length of a meter was based on its 86 isotope Jeopardy Words Answer. The answer to A noble gas not superman's home planet the length of a meter was based on its 86 isotope has 7 letters. This clue belongs to the Chemistry category and is part of Jeopardy Word Level 502. If you scroll near the bottom you will find other clues and answers part of level 502