First slide

Kinetics of nuclear reactions or nuclear chemistry

Question

The number of beta particles emitted in the radioactive decay series from $_{92}^{238} U {to}_{82}^{206} Pb is$

Moderate

A

10
B

8
C

6
D

2

Solution

Number of $β$ -particles = 2 x number of $α$ -particles - changes in atomic number
$Number of α -particles = \frac{238 - 206}{4} = 8$
$Number of β -particles = (2 \times 8) - (92 - 82)$
$= 16 - 10 = 6$

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