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OpenStudy (anonymous):
an atom has an atomic number of 12 and a mass of 25. How many neutrons does the atom have f
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OpenStudy (ipwnbunnies):
The atomic number of an element tells us how many protons are in one atom of that element. The atomic mass is the sum of protons and neutrons in an atom. So, since this atom has 12 protons, and 25 protons and neutrons, how many neutrons does it have?
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