(a)Calculate the energy relaeased if ``^238U` emits an `alpha -partical .(b)calculate the energy to be supplied to ``^238U`. if two protons and two neutrons are to be emitted one by one .The atomic massed of ``^238U, `^234Th``and ``^4He`are 238.0508U,234.04363 u and 4.00260 u respectively.

Answer

A, B, C, D

Explanation

`(a) U^(238) rarr `_2He^4 + Th^(234)`
`E = [M_u - (N_(He) + M_m)]u`
`= [238.05087 - (234.04363`
`+ 4.00260)]u`
`=4.25467 MeV = 4.255 MeV`.
(b) `U_(233) rarr Th^(234) + 2n_(0) + 2p`
`=[238.0508 - 234.6463 + 2`
`(1.008665) + 2(1.007276)]u`
`=0.024712u`
`=23.0068 = 23.007 MeV`.