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The number of alpha and beta-particles e...

The number of `alpha` and `beta`-particles emitted in the nuclear reaction `._(90)^(210) Th to ._(83)^(212)Bi` are:

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The correct Answer is:
5
`""_(90)^(238)Th to ""_(83)^(212)Bi`
`alpha`- particles `=(228- 212)/(4) = 4`
`beta`- particles `= 2 xx 4 - (90- 83) = 1 `
Total particles = 5
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