6063Chemical EngineeringMedium
The mass number of an element is equal to the number of ________ in the nucleus?
ANeutrons plus protons (i.e., nucleons)
BProtons
CNeutrons
DElectrons
Correct answer
A. Neutrons plus protons (i.e., nucleons)
Explanation
The correct answer is Neutrons plus protons (i.e., nucleons).