How do two isotopes of the same element differ?
A) Their nuclei have different number of protons.
B) Their electrons have different orbits.
C) They have different electrical charges.
D) Their neutrons differ in number.
E) They have a different atomic number.

Question

Quizplus · Accepted Answer

Isotopes of the same element have the same number of protons (and therefore the same atomic number) but differ in the number of neutrons in their nuclei.

How Do Two Isotopes of the Same Element Differ