A radioactive isotope is an isotope that
A. is stable.
B. decays.
C. has more protons than the common variant of the element.
D. has the same atomic mass but a different atomic number than the common variant of the element.
Answer:B
A radioactive isotope is an isotope that
A. is stable. B. decays. C. has more protons than the common variant of the element. D. has the same atomic mass but a different atomic number than the common variant of the element.