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  •  nucleus, after absorbing energy, decays into two <img alt="\alpha" src="/latex-image/?%5Calpha"

{ }^{22} \mathrm{Ne} nucleus, after absorbing energy, decays into two \alpha-particles and an unknown nucleus. The unknown nucleus is :

Option: 1

nitrogen


Option: 2

carbon


Option: 3

boron


Option: 4

oxygen


Answers (1)

best_answer

Atomic number of neon is 10.

By the emission of two \alpha -particles, atomic number will be reduced by 4 . Therefore, atomic number of the unknown element will be

Z=10-4=6

Similarly mass number of the unknown element will be

A=22-2 \times 4=14

\therefore \text { Unknown nucleus is carbon }(A=14, Z=6) \text {. }

Posted by

Sayak

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