Isotopes are atoms of the same element that have
A)the same atomic numbers but different numbers of electrons.
B)the same atomic number but different numbers of neutrons.
C)the same atomic mass but different numbers of protons.
D)the same atomic numbers but different numbers of protons.
E)different atomic numbers.

Question

Quizplus · Accepted Answer

Isotopes have the same number of protons, which is the atomic number, but they have different numbers of neutrons, which can result in different atomic masses. Therefore, option B is the correct answer.

Isotopes Are Atoms of the Same Element That Have