He suggested that an atom was a tiny solid ball. He published his ideas in 1803. This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of ...

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.

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 ...

Leaflets dropped on cities in Japan warning civilians about the atomic bomb, dropped c. August 6, 1945. Aftermath of the August 6, 1945 Atomic Bomb blast in Hiroshima, 1946. Library of Congress ...