However, there was still a difference between the atomic number of the atom and the atomic mass. Bohr and other scientists knew that there also had to be a neutral particle the same size as a ...

What’s the difference between nuclear fission and nuclear fusion ... Fission splits a heavy element (with a high atomic mass number) into fragments; while fusion joins two light elements (with a low ...

A pivotal scene in the explosive hit biopic and Best Picture winner, "Oppenheimer," involves America's top scientists ...

For four years, James Chadwick was a prisoner of war in Germany. When World War I ended, he returned to his native England to rejoin the mentor of his undergraduate days, Ernest Rutherford.