how are isotopes defined?\nforms of different elements that have the same number of neutrons in each…

how are isotopes defined?\nforms of different elements that have the same number of neutrons in each atom\nforms of different elements that have the same number of protons in each atom\nforms of the same element that differ in the number of neutrons in each atom\nforms of the same element that differ in the number of protons in each atom
Answer
Brief Explanations:
Isotopes are variants of a single element. They have the same number of protons (which defines the element) but different numbers of neutrons.
Answer:
C. forms of the same element that differ in the number of neutrons in each atom