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Assertion :An alpha-particle is emitted ...

Assertion :An `alpha`-particle is emitted when uranium 238 decays into thorium
Reason : The decay of uranium 238 to thorium is represented by `._92^238 U to ._90^234Th + ._2^4 He `. The helium nuclei is called an alpha particle.

A

If both assertion and reason are true and reason is the correct explanation of assertion .

B

If both assertion and reason are true but reason is not the correct explanation of assertion .

C

If assertion is true but reason is false .

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
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