Learn more about atoms and the Rutherford-Bohr model of an atom in this ... Nuclear fission is the splitting of a large atomic nucleus such as uranium into smaller nuclei with the release of ...

Photo: Atomic bomb test ... With the help of Niels Bohr, she got a position in Stockholm. From there, Meitner and her nephew Otto Frisch proved that the uranium atom had been split.

Bohr went on to make enormous contributions to physics and, like Rutherford, to train a new generation of physicists. But his atomic model remains the best known work of a very long career.

In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons ... However, there was still a difference between the atomic number of the atom and the atomic mass.