In the following radioactive decay, `""_(92)U^(238)rarr ""(89)Y^(220)` , how many `alpha` and `beta` particles are ejected from X to form Y ?

Options

A. `3 alpha` and `3 beta`
B. `4 alpha` and `3 beta`
C. `3 alpha` and `5 beta`
D. `5 alpha` and `5 beta`

Answer

A

Explanation

`""_(92)X^(232) to ""_(89)Y^(230) + x_(2)He^(4) +y""_(-1)e^(0)`
`232=220 + 4x implies x=3`
`92=89+2x -y implies y=3" "(because x=3)`
No. of `alpha`-particles emitted ,x=3
No. of `beta` -particles emitted , y=3