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When an alpha particle is emitted from a...

When an `alpha` particle is emitted from a nucleus, its

A

Atomic number increases by 2 and mass number increases by 4

B

Atomic number increases by 1 and mass number remains the same

C

Atomic number decreases by 2 and mass number decreases by 4

D

Atomic number and mass number remain the same

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The correct Answer is:
C
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