What is approximately the sum of the number of protons and neutrons of an atom?
A. Atomic mass
B. Atomic number
C. Atom subscript
D. Valence shell
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Answer: A
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What is approximately the sum of the number of protons and neutrons of an atom?
A. Atomic mass
B. Atomic number
C. Atom subscript
D. Valence shell
Answer: A
Share your understanding of this question with the correct explanation.