A radioactive nucleus with Z protons and...

A radioactive nucleus with `Z` protons and `N` neutrons emits an `alpha-`particle, `2 beta-`particle and `2 gamma` rays. The number of protons and neutrons in the nucleus left after the decay respectively, are

A

`Z-3, N-1`

B

`Z-2, N-2`

C

`Z-1, N-3`

D

`Z, N-4`

Verified by Experts

The correct Answer is:

D

`Z. = Z-2 + 2= Z`
`A.= A- 4`
`therefore N. = (A- 4)`
`= N-4`

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