M.Sc. Bio-Physics (PU-CET P.G) 2018 Panjab University Entrance Exam With Answers

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32.

Isotopes are atoms with the same number of:-

A: protons and varying number of neutrons
B: neutrons and varying number of protons
C: protons and varying number of electrons
D: electrons and varying number of neutrons

The answer is: A

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