There he met J.J. Thomson (who would soon discover ... He discovered the atomic nucleus and developed a model of the atom that was similar to the solar system. Like planets, electrons orbited ...

Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is ...

Physicists from both New Zealand and Britain have been credited with splitting the atom — but there is consensus that it was not an American.