If two atoms are isotopes of the same element, the atoms must have

June 2018 NY Regents Chemistry Exam

3 If two atoms are isotopes of the same element, the atoms must have

(1) the same number of protons and the same number of neutrons

(2) the same number of protons and a different number of neutrons

(3) a different number of protons and the same number of neutrons

(4) a different number of protons and a different number of neutrons

Solution: Isotopes are atoms of the same element (same number of protons) with a different number of neutrons.

Answer: 2

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