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Uranium-238 undergoes alpha decay. Therefore, uranium-238 will. . A. remain stable.. . B. change into a different element altogether.. . C. emit neutral particles and no energy.. . D. none of the above

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The correct answer among the choices listed above is option B. Uranium-238 undergoes alpha decay. Therefore, uranium-238 will change into a different element altogether. As the alpha particles emitted, it changes that element's atom into another atom.

Answer:  B. change into a different element altogether.

Explanation:

Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

\(_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}+_2^4\alpha\)

Uranium-238 undergoes alpha decay to give:

\(_{92}^{238}\textrm{U}\rightarrow _{90}^{234}\textrm{Th}+_2^4\alpha\)

Thus uranium undergoes alpha decay to give thorium with atomic number 90 and is a different element altogether.

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