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What makes up an isotope’s mass number? A.) The number of protons and neutrons B.) The number of protons, neutrons, and electrons C.) The number of stable isotopes of an element
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What makes up an isotope’s mass number?

A.) The number of protons and neutrons
B.) The number of protons, neutrons, and electrons
C.) The number of stable isotopes of an element

User Aez
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Answer:

A

Step-by-step explanation:

User Charles Ward
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