A) same number of neutrons
B) same number of positron
C) same number of protons
D) same number of nucleus
Correct Answer: C
Solution :
Isotopes are atoms of same element having \[\to \] same atomic number \[\to \] different mass number \[\to \] same number of protons \[\to \] different number of neutrons whereas atoms having same mass number, i.e., same number of nucleons are called isobars. Atoms having same number of neutrons are called isotones.
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