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21 June, 12:18

The mass number of an atom is equal to which of the following?

Question 15 options:

the number of protons in a nucleus

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

the number of electrons circling the nucleus of an atom

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

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Answers (1)
  1. 21 June, 14:54
    0
    Mass number is equal to the number of protons plus the number of neutrons in a nucleus of an atom
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