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When an alpha particle emitted from an u...

When an alpha particle emitted from an unstable nucleus, the mass number of the nucleus

A

increases by 2

B

increases by 4

C

decreases by 4

D

decreases by 2

Text Solution

Verified by Experts

The correct Answer is:
C
`""_(Z)^(A)Xto""_(Z-2)^(A-4)Y+""_(2)^(4)alpha`
`alpha`-particle causes loss of 2P and 2n.
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Knowledge Check

  • When a beta -particle is emitted from a nucleus, the neutron-proton ratio

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