AP Chemistryeasymcq1 pt
The mass number of an atom is equal to:
A.The number of protons
B.The number of neutrons
C.The number of protons plus neutrons
D.The number of electrons
Explanation
Core Concept
The mass number (A) equals the total number of protons (Z) plus neutrons (N): A = Z + N.
Correct Answer
CThe number of protons plus neutrons
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