A) Z ? 3, N ? 1
B) Z ? 2, N ? 2
C) Z ? 1, N ? 3
D) Z, N ? 4
Correct Answer: D
Solution :
With emission of an \[\alpha \]particle \[{{(}_{2}}H{{e}^{4}})\]mass number decreases by 4 unit and atomic number decrease by 2 units and with emission of \[2{{\beta }^{-1}}\]particle atomic number increases by 2 units. So Z will remain same and N will become \[N-4.\]
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