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.(15)P^(29) has n//p ratio too low for s...

`._(15)P^(29)` has `n//p` ratio too low for stability. Its stability can be increased by
a. Positron emission b. Beta-decay
c. Alpha-decay d. Electron capture

A

a. Positron emission

B

b. Beta-decay

C

c. Alpha-decay

D

d. Electron capture

Text Solution

Verified by Experts

The correct Answer is:
a. Positron emission
Positron emission increases the number of neutron.
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In alpha- decay , n//p ratio :

In beta- decay n//p ratio :

Unstable nuclei attain stability through disintegration. The nuclear stability is related to neutron proton ratio (n//p) . For stable nuclei n//p ratio lies close to unity for elements with low atmoic numbers (20 or less) but it is more than 1 for nuclei having higher atomic numbers. Nuclei having n//p ratio either very high or low undergo nuclear transformation. When n//p ratio is higher than required for stability, the nuclei have the tendency to emit beta -rays. while when n//p ratio is lower than required for stability, the nuclei either emits alpha -particles or a positron or capture K -electron. beta -particle is emitted in radioactivity by