Question:
Choose the best definition for mass number. O Mass number is
Last updated: 7/4/2022
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Choose the best definition for mass number. O Mass number is the mass of all protons in an atom. O Mass number is the sum of the number of neutrons and electrons for an atom. O Mass number is the sum of the number of protons and the number of neutrons for an atom. O Mass number is the mass of an atom.