This theory was consistent with the known fact that atoms were electrically neutral. Thomson's plum pudding model was the dominant theory.
Rutherford Model Atom Step By Step Guide
This result was so unexpected that Rutherford famously likened it to firing a cannonball at a piece of tissue paper and having it bounce back. The entire atom is electrically neutral because the total positive charge of the nucleus is balanced by the total negative charge of the electrons.
The nucleus contains nearly all of the atom's total mass, despite occupying a minuscule fraction of its volume. However, it failed to explain certain phenomena, particularly the behavior of particles during scattering experiments.
Rutherford Model Atom Step By Step Guide
This model depicted the atom as a uniform sphere of positive charge, with negatively charged electrons embedded within it like plums in a pudding. His chief collaborators, Hans Geiger and Ernest Marsden, directed a stream of alpha particles—positively charged particles emitted by radioactive substances—at an extremely thin sheet of gold foil.
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