Question

The discovery of sub-atomic particles led to a revolution in the study of matter.
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Answer 1

Answer:

The first subatomic particle to be discovered was the electron, identified in 1897 by J. J. Thomson. ... The next particles discovered were related to attempts to explain the strong interactions, or strong nuclear force, binding nucleons (protons and neutrons) together in an atomic nucleus.

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Answer 2

Answer:

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The three main sub-atomic particles associated with an atom are:

1. Proton(positively charged)- discovered by Ernst Rutherford by the gold foil experiment

2. Neutrons(no charge)- discovered by James Chadwick

3. Electrons(negatively charged)- discovered by John Joseph Thomson by performing experiments with cathode rays