A radioactive element X emits 3α, 1β and 1 - particles and forms ₇6}Y²35}. Element X is

Correct Answer is : 81X247₈1}X²47}81X247

Correct Answer is : 81X247₈1}X²47}81X247

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VITEEE 2010 Paper

Question : 52 of 120

Marks: +1, -0

1\gamma

_{76}Y^{235}.

Element X is

Solution:

The complete nuclear reaction is

{}_z^A X \rightarrow \; {}_76^{235} Y + {3\,{}_2^4\mathrm{He}}_{\alpha\text{-particle}} + {\,{}^0_{-1}e}_{\beta\text{-particle}} + \;\,\gamma_{\gamma\text{-particle}}

On observing the reaction, mass number of 'X' is

A = 235 + 12 + 0 = 247

On observing the reaction, atomic number of 'X' is

Z = 76 + 6 - 1 =81

Hence, element 'X' is

_{81}X^{247}.

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