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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?

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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4 votes
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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User Alexander Somov
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2 Answers

3 votes

12 protons, 12 electrons and 13 neutrons

answered
User DRiFTy
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7.9k points
5 votes
It has 12 protons and 12 electrons.
And it has 13 neutrons.
answered
User Marc Wagner
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8.2k points
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