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The mass number of an atom is obtained by totaling the number of _____. electrons and neutrons protons and neutrons protons and electrons
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The mass number of an atom is obtained by totaling the number of _____.

electrons and neutrons


protons and neutrons


protons and electrons

User Dom Vinyard
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3 votes

Answer:

The number of an atom is obtained by totaling the number of protons and neutrons, to have an equivalent number of protons and neutrons.

Step-by-step explanation:

User AbsoluteBeginner
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6 votes

Answer:

The answer is Protons and neutrons.

User Keith Holloway
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