Question: Two atoms have the same Z-number. Which statement is true? If they have different A-numbers, then one is an ion. If they have different A-numbers,

Two atoms have the same Z-number. Which statement is true? If they have different A-numbers, then one is an ion. If they have different A-numbers, then they are isotopes. If they have the same A-numbers, then one is an ion. If they have the same A-numbers, then they are isotopes

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