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What is the mass of an atom that has 10 protons, 13 neutrons, and 10 electrons? 10 20 23 33?
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What is the mass of an atom that has 10 protons, 13 neutrons, and 10 electrons? 10 20 23 33?

User Diego Fernando Pava
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It would be 23, s choice C. 
User Haabda
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