Chemistry · Atomic Structure

A nucleon is either a proton or a neutron, which are the subatomic particles found in the nucleus of an atom. They are held together by the strong nuclear force, which overcomes the repulsive forces between the positively charged protons. This binding is crucial for the stability and mass of the atom. The other options are incorrect: 'Any atomic nucleus' describes a region, not the specific particles; 'A radioactive atomic nucleus' refers to the behavior of the nucleus, not the definition of nucleons; and 'A neutron proton or an electron' includes an electron, which is not part of the nucleus.

This is incorrect because 'nucleon' specifically refers to the individual particles within the nucleus, namely protons and neutrons, rather than the nucleus itself.

This option is incorrect. The term 'radioactive' pertains to the behavior of certain nuclei, not to the definition of a nucleon, which is simply a proton or a neutron.

Correct! A nucleon is defined as either a proton or a neutron, the subatomic particles that are constituents of the atomic nucleus, bound together by the strong nuclear force.

Incorrect. While protons and neutrons are nucleons, electrons are not part of the nucleus; they orbit around it.