Which one of the following statements about the properties of neutrons

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Which one of the following statements about the properties of neutrons is not correct?

Neutron mass is almost equal to proton mass.
Neutrons possess zero charge.
Neutrons are located inside the atomic nuclei.
Neutrons revolve around the atomic nuclei.
This question was previously asked in
UPSC CDS-2 – 2020
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The statement that neutrons revolve around the atomic nuclei is not correct.
Neutrons are fundamental particles found in the nucleus of atoms (with the exception of the most common isotope of hydrogen). They are electrically neutral, possessing zero charge. Their mass is very close to that of a proton, slightly greater but often considered almost equal for simplicity. Protons and neutrons collectively form the atomic nucleus, which is located at the center of the atom. Electrons, which are negatively charged particles, revolve around the atomic nucleus in specific energy levels or orbitals.
The nucleus contains most of the atom’s mass. The number of neutrons in the nucleus determines the isotope of an element. The strong nuclear force binds protons and neutrons together in the nucleus, overcoming the electrostatic repulsion between protons.

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