Which is true of isotopes of an element?
A) They have different numbers of electrons.
B) They have different numbers of neutrons.
C) They have different numbers of protons.
D) They have different chemical properties.

Question

Quizplus · Accepted Answer

Isotopes of an element have the same number of protons (as they are the same element) but different numbers of neutrons. This gives them different atomic mass values. The number of electrons remains the same for isotopes of an element, as it is determined by the atomic number (number of protons). Isotopes may have slightly different physical properties due to their differing atomic masses but have the same chemical properties as they have the same number of electrons and protons.

Which Is True of Isotopes of an Element