Question

Suppose atom 1 has the same number of protons as atom 2, and atom 2 has the same number of neutrons as atom 3. Atom 1 does not have the same number of neutrons as atom 3. Which of the following statements is true?
A) Atom 3 must have the same number of protons as atom 2.
B) Atoms 1 and 2 must be isotopes.
C) Atoms 1 and 3 must be isotopes.
D) Atom 2 must have the same number of neutrons as atom 1.
E) Atom 3 must have the same number of protons as atom 1.

Answer

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