An American physical chemist who received the Nobel Prize in Chemistry in 1934 for discovering the isotope deuterium. He also do important function in uranium enrichment and isotope parting through gaseous diffusion. He visited an Amish quality college in Indiana like a young man. He was granted the Medal of Merit for focusing on the Manhattan task. He previously four children along with his wife Frieda Daum who he wedded in 1926. Like Albert Einstein, he was a Nobel laureate who done the Manhattan Task.