The nuclide `X` undergoes `alpha`-decay and another nuclides `Y` undergoes `beta^(ɵ)`-decay, which of the following statement `"is"//"are"` correct? a)The `beta^(ɵ)`-particles emitted by `Y` may have widely different speeds. b)The `alpha`-particles emitted by `X` may have widely different speeds. c)The `alpha`-particles emitted by `X` will have almost same speed. d)The `beta`-particles emitted by `Y` will have the same speed.

Options

A. all the `alpha`  particles emitted by A will have almost the same speed
B. the `alpha ` particles emitted by A may 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

A, D

Explanation

In `alpha`  decay, the entire energy is carried away by the `alpha`  particle as its kinetic energy In ` beta` decay, the energy is shared between the ` beta` particle and the antineutrino. Hence, the speed of the  `beta` particle will vary, depending on the energy of the antineutrino