Isotopes of a given element have
A) the same number of protons but differ in atomic mass.
B) the same atomic mass but a different number of protons.
C) a different number of electrons.
D) the same number of protons and atomic mass.
E) the same number of neutrons.

Question

Quizplus · Accepted Answer

Isotopes of the same element have the same number of protons, which defines the element, but they can have different numbers of neutrons, resulting in different atomic masses. Therefore, option A is the correct answer. Option B is incorrect because isotopes have different numbers of protons. Option C is incorrect because isotopes have the same number of electrons for a given element. Option D is incorrect because isotopes have different atomic masses. Option E is incorrect because isotopes can have different numbers of neutrons.

Isotopes of a Given Element Have