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Alpha Decay

22Ne nucleus,...

Question

$^{22} N e$ nucleus, after absorbing energy, decays into two $α$ -particles and an unknown nucleus. The unknown nucleus is

A

nitrogen

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B

carbon

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C

boron

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D

oxygen

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Solution

The correct option is A carbon
$^{22} N e$ decays
$α$ particle = $H e^{2 +}$
Mass No = 4
$p = 2, n = 2$
So, New mass no. $= 22 - 8 = 14$
Atomic No. $= 10 - 4 = 6$
So, the new element is $_{6} C^{14}$

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