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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asked Dec 18, 2022 4.1k views

2 votes

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