Two isotopes of the same element differ only in the number of protons found in the nucleus.

Name: Two isotopes of the same element differ only in the number of protons found in the nucleus.
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Quizplus · Accepted Answer

Two isotopes of the same element differ in the number of neutrons found in the nucleus, not in the number of protons. Isotopes have the same number of protons, which defines the element, but a different number of neutrons, resulting in a different atomic mass.

Two Isotopes of the Same Element Differ Only in the Number