Isotopes are
A) elements with the same number of electrons but different numbers of protons.
B) elements with the same number of protons but different numbers of electrons.
C) elements with the same number of electrons but different numbers of neutrons.
D) elements with the same number of protons but different numbers of neutrons.
E) elements with the same number of neutrons but different numbers of protons.

Question

Quizplus · Accepted Answer

Isotopes are atoms of the same element with the same number of protons (same atomic number) but different numbers of neutrons (different atomic mass). This means that isotopes have similar chemical properties but different physical properties, such as different atomic masses and different radioactive decay rates.

Isotopes Are