Isotopes of an element have the same number of ______ and different numbers of ______.
A. protons… neutrons
B. protons… electrons
C. neutrons… protons
D. electrons… protons
Answer:A
Isotopes of an element have the same number of ______ and different numbers of ______.
A. protons… neutrons B. protons… electrons C. neutrons… protons D. electrons… protons