Question

A nuclide 'A' undergoes $\alpha -decay$ and another nuclide B undergoes $\beta -decay$. Then

• A. all the $\alpha -particles$ emitted by A will have almost the same speed
• B. the $\alpha -particles$ emitted by B will have widely different speeds
• C. all the $\beta -particles$ emitted by B will have almost the same speed
• D. the $\beta -particles$ emitted by B may have widely different speeds

Answer 1

Answer: (A), (D)

The correct options are
A all the $\alpha -particles$ emitted by A will have almost the same speed
D the $\beta -particles$ emitted by B may have widely different speeds

$\beta$-particles are decelerated by electromagnetic interactions and may give off Bremsstrahlung X-rays.
Hence, they have wide range of speeds.
$\alpha$- particles move on with almost same speed.