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Which of the following are radioacitve? ...

Which of the following are radioacitve?
a. `._(48)Cd^(114)` b. `._(49)In^(114)` c. `._(50)Sn^(114)`

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The correct Answer is:
`._(49)^(114) In` odd number of nucleons
Odd no of protons or neutrons or both present in nucleus then it will radioactive according to even odd theory.
so `._(49)^(119)ln` unstable
49 odd No.
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