Which of the following statements concerning isotopes is true?
A) All isotopes of a given element are radioactive.
B) Various isotopes of the same element exhibit very different chemical reactivity.
C) Various isotopes of the same element have the same number of protons.
D) Every element has 3 isotopes.
E) Various isotopes of the same element have the same mass.

Question

Quizplus · Accepted Answer

Isotopes of the same element have the same number of protons, but different numbers of neutrons. This means that they have the same atomic number (which defines the element), but different atomic masses.

Which of the Following Statements Concerning Isotopes Is True