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If an atom has 34 protons and 40 neutrons, what is its mass number?

If an atom has 34 protons and 40 neutrons, what is its mass number?
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If an atom has 34 protons and 40 neutrons, what is its mass number?

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User Man Zet
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2 Answers

5 votes

The answer is 74

The mass equals the number protons and neutrons.

34+40= 74

answered
User Katiana
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8.7k points
4 votes
Mass number is the total of neutrons and protons added together therefore it is 34+40 which is 74. This is the mass number for the atom.
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User Jason Frank
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8.2k points
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