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What defines the mass number of an isotope? A. The sum of the neutrons and protons B. The sum of the neutrons and electrons C. The number of neutrons D. The number of protons
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What defines the mass number of an isotope?

A. The sum of the neutrons and protons
B. The sum of the neutrons and electrons
C. The number of neutrons
D. The number of protons

User Watson
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2 Answers

9 votes

Answer:

a

Step-by-step explanation:

User Pouryak
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5.6k points
8 votes

Answer:

A

Step-by-step explanation:

User Existdissolve
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