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Chemistry, 03.08.2019 04:00 asdf2342

If an atom of the twelfth element (magnesium) has an atomic mass of 25, how many protons (p), neutrons (n), and electrons (e) does it have?

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If an atom of the twelfth element (magnesium) has an atomic mass of 25, how many protons (p), neutro...
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