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Which of the following isotopes is more ...

Which of the following isotopes is more stable and why?
(a) `._(3)^(7)Li` or `._(3)^(8)Li`
(b) `._(6)^(13)C` or `_(6)^(15)C`
(c) What kind of decay will be shown by the unstable nuclei in the above sets (a) and (b)?

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Verified by Experts

The correct Answer is:
(a) `._(3)^(7)Li` (b) `._(6)^(13)C`
(c) `._(3)^(8)Lirarr` negaive `beta` decay; `._(6)^(15)Crarr` negative `beta` decay
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