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An atom has 13 protons and 14 neutrons. What is its mass number?
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3 votes
An atom has 13 protons and 14 neutrons. What is its mass number?

User Matt Coughlin
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2 Answers

3 votes

you add 13 and 14 and get 27 because It is the total amount.
User Aqdas
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8.1k points
1 vote
Protons have a mass of 1
Neutrons have a mass of 1

So 13*1 + 14*1 = Mass number 27
User Jaqueline Passos
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8.2k points
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