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 ...

Ernest Rutherford's family emigrated from ... He discovered the atomic nucleus and developed a model of the atom that was similar to the solar system. Like planets, electrons orbited a central ...

The discovery of the make-up of the nucleus (protons and neutrons) came much later, and was not made by Rutherford. The nucleus was calculated to be about 1/10,000th the size of the atom.

He based his designs on the best German models and on new American ... tracers), Ernest Marsden (atomic nucleus) and James Chadwick (a Manchester student who later discovered the neutron). Hans Geiger ...

In 1803, John Dalton's atomic theory brought ... Rutherford made a series of discoveries about the nature of atoms and, working with colleagues Hans Geiger and Ernest Marsden, presented a ...