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What is the mass number of an atom equal to? the number of protons plus the number of electrons in an atom the number of protons plus the number of neutrons in a nucleus the number of electrons circling
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What is the mass number of an atom equal to?

the number of protons plus the number of electrons in an atom


the number of protons plus the number of neutrons in a nucleus


the number of electrons circling the nucleus of an atom


the number of protons in a nucleus

User Shaun Mitchell
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2 Answers

6 votes

Answer: the number of electrons circling the nucleus of an atom

Step-by-step explanation:

User Jessems
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1 vote

Answer:

number of protons plus the number of electrons in an atom

User Florian Mayer
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