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An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? express your answer as an integer.
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An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? express your answer as an integer.

User Obelia
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13 because an atom has the same number of protons as neutrons
User Prabagaran
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