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22Ne nucleus, after absorbing energy, decays into two α-particles and an unknown nucleus. The unknown nucleus is

(A) nitrogen         (B) carbon           (C) boron             (D) oxygen

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The correct answer is option B) carbon 

Explanation::

22Ne decays

α particle = He2+

Mass No = 4

p=2,n=2

So, New mass no. =22−8=14

Atomic No. =10−4=6

So, the new element is  6C14 

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