JEE PHYSICS MCQ: NUCLEI

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The radioactive decay of uranium into thorium is expressed by the equation

_{92}^{238}U \to _{90}^{234}Th\,\, + \,X

, where

'X'

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Correct option: D

An alpha particle

Option D (An alpha particle) is correct because the uranium decay equation shows a mass number decrease of 4 and atomic number decrease of 2, which corresponds to an alpha particle emission.

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