Q.

The number of beta particles emitted in the radioactive decay series from  92238U to 82206Pb is

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a

10

b

8

c

6

d

2

answer is C.

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Detailed Solution

Number of β-particles = 2 x number of α-particles - changes in atomic number Number of α-particles =238−2064=8 Number of β-particles =(2×8)−(92−82)                                           =16−10=6
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The number of beta particles emitted in the radioactive decay series from  92238U to 82206Pb is