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How may alpha- and beta- particles will ...

How may `alpha-` and `beta-` particles will be emitted when `._(90)Th^(232)` changes into `._(82)Pb^(208)`?

A

2,2

B

4,2

C

6,4

D

8,6

Text Solution

Verified by Experts

The correct Answer is:
C
`""_(90)Th^(232) to ""_(82)Pb^(208)+""_(x_(2))He^(4)+y ""_(-1)e^(0)`
232=208+4x+0y
4x=24
x=6
90=82+2x-y
`90=82+2xx6-y`
`y=94-90`
y=4
Thus `6alpha` and `4beta` particles are emitted.
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