Two isotopes of an element differ only in their
A) symbol.
B) atomic number.
C) atomic mass.
D) number of protons.
E) number of electrons.

Question

Quizplus · Accepted Answer

Isotopes of an element have the same number of protons (atomic number) but different numbers of neutrons, resulting in different atomic masses. Therefore, the only difference between isotopes of an element is their atomic mass.

Two Isotopes of an Element Differ Only in Their