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Question

2713Al is a stable isotope. 2913Al is expected to disintegrate by:

A
α-emission
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B
β-emission
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C
positron emission
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D
proton emission
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Solution

The correct option is A β-emission
Stable isotope : 2713Al
n/p ratio = 14/13
Unstable isotope = 2913Al
n/p ratio = 16/13
Nuclides having n/p ratio greater than 1 undergoes β-emission to decrease n/p ratio in order to attain belt of stability.

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