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What is the mass number of an atom with 5 protons and 7 neutrons?
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1 vote
What is the mass number of an atom with 5 protons and 7 neutrons?

User Cesar N Mejia Leiva
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2 Answers

5 votes
Pretty close to 12 .
User Stivlo
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8.1k points
4 votes
Boron I think look at the periodic table
User Umer
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