Below you can find the In 1938 a sample of this element symbolized u was split into smaller barium atoms Jeopardy Words Answer. The answer to In 1938 a sample of this element symbolized u was split into smaller barium atoms has 7 letters. This clue belongs to the Nuclear physics category and is part of Jeopardy Word Level 475. If you scroll near the bottom you will find other clues and answers part of level 475