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How many alpha-and beta-particle will be...

How many `alpha`-and `beta`-particle will be emitted when `._(98)Th^(234)` change into `._(84)Po^(218)`?

Text Solution

Verified by Experts

`underset("Parent")(._(90)Th^(234) rarr ._(84)Po^(218)`
Decrease in mass `= (234 - 218) = 16`
Mass of 1 `alpha-"particle" `= 4 amu
Therefore, number of `alpha`-particles emitted
Number of `beta`-emitted - (Atomic number `= 2 xx` Number of `beta`-particles - Atomic number of end product)
`2 xx 4 - (90 - 84) (8 - 6) = 2`
Hence, number of `alpha`-particles = 4
and number of `beta`-particles = 2
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