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Question: Answered & Verified by Expert
${ }^{234}$ U has 92 protons and 234 nucleons total in its nucleus. It decays by emitting an alpha particle. After the decay it becomes
PhysicsCurrent ElectricityVITEEEVITEEE 2008
Options:
  • A ${ }^{232} \mathrm{U}$
  • B ${ }^{232} \mathrm{~Pa}$
  • C ${ }^{230} \mathrm{Th}$
  • D ${ }^{230} \mathrm{Ra}$
Solution:
1554 Upvotes Verified Answer
The correct answer is: ${ }^{230} \mathrm{Th}$
The $\alpha$ - decay in the case of ${ }^{234} \mathrm{U}$ takes place as follows :
${ }_{92}^{234} \mathrm{U} \longrightarrow{ }_{90}^{230} \mathrm{Th}+{ }_{2}^{4} \mathrm{He}$

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