The isotopes of an element differ in
A. the number of neutrons in the nucleus
B. the charge on the nucleus
C. the number of extra-nuclear electrons
D. both the nuclear charge and the number of extra-nuclear electrons
Answer:A
The isotopes of an element differ in
A. the number of neutrons in the nucleus B. the charge on the nucleus C. the number of extra-nuclear electrons D. both the nuclear charge and the number of extra-nuclear electrons