First slide

Radio activity

Question

In the given nuclear reaction, how many $α and β$ particles are emitted ${}_{92}X^{235} {}_{82}Y^{207} ?$

Moderate

A

3 $α$ particles and 2 $β$ particle
B

4 $α$ particles and 3 $β$ particle
C

6 $α$ particles and 4 $β$ particle
D

7 $α$ particles and 4 $β$ particle

Solution

$n_{α} = \frac{A - A'}{4} = \frac{235 - 207}{4} = 7 n_{β} = (2 n_{α} - Z + Z') = (2 x 7 - 92 + 82) = 4$

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