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13. Nuclei — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics13. Nuclei1 Mark
MCQ
Some radioactive nucleus may emit
  • ✓
    Only one $\alpha ,\;\beta $ or $\gamma $ at a time
  • B
    All the three $\alpha ,\;\beta $ and $\gamma $ one after another
  • C
    All the three $\alpha ,\;\beta $ and $\gamma $ simultaneously
  • D
    Only $\alpha $ and $\beta $ simultaneously
✓

Answer

Correct option: A.
Only one $\alpha ,\;\beta $ or $\gamma $ at a time
a
(a) No radioactive substance emit both $\alpha $ and $\beta $ particles simultaneously.

Some substances emit $\alpha - $ particles and some other emits $\beta - $ particles.

$\gamma - $ rays are emitted along with both $\alpha  $ particles.

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