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Which of the following observations led physicist James Chadwick to perform experiments that eventually led to the discovery of the neutron?

AProtons alone were not able to account for the density of an atoms nucleus.

BAtomic nuclei possess shells similar to the electron shells of atoms.

CSome atoms contained more protons than electrons.

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The correct answer is letter C. James Chadwick confirmed the existence of neutrons.In his experiment, he was able to show that the particles that were ejected had no electrical charge but had almost the same mass as the proton. These particles were, of course, neutrons.

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