Question

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

Answer 1

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