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Question: The radioactive decay of uranium into thorium is expressed by the equation\({}_{92}^{238}U \rightarr...

The radioactive decay of uranium into thorium is expressed by the equation92238U→90234Th+X,{}_{92}^{238}U \rightarrow_{90}^{234}Th + X, where ′X′'X'is.

A

An electron

B

A proton

C

A deuteron

D

An alpha particle

Answer

An alpha particle

Explanation

Solution

92U238→92Th234+2He492U^{238} \rightarrow_{92}Th^{234} +_{2}He^{4}