Which of these refers to atoms with the same atomic number

Subject : Physics

Question: Which of these refers to atoms with the same atomic number but different atomic masses?

A) These atoms are different elements.

B) These atoms have different numbers of electrons.

C) These atoms are isomers.

D) These atoms are isotopes.

E) These atoms have different numbers of protons.

Expert Verified Solution:

The correct answer is:

D. These atoms are isotopes.

Explanation:

Atoms with the same atomic number but different atomic masses are called isotopes. Isotopes of an element have the same number of protons (and thus the same atomic number) but different numbers of neutrons, which results in different atomic masses.