2. Choose the 2 atoms that are isotopes. Think about what isotopes have in common and what they have that differs. *
1 point
16 protons, 18 neutrons, 16 electrons
17 protons, 18 neutrons, 18 electrons
17 protons, 18 neutrons, 17 electrons
16 protons, 15 neutrons, 16 electrons

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