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Assertion: For the scattering of alpha-p...

Assertion: For the scattering of `alpha`-particles at a large angles, only the nucleus of the atom is responsible.
Reason: Nucleus is very heavy in comparison to electrons.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
We know that an electron is very light particle as compared to an `alpha`particle. Hence electron cannot scatter the `alpha`-particel at large angles, according to law of conservation of momentum. On the other hand, mass of nucleus is comparable with the mass of `alpha-`particle, hence only the nucleus of atom is responsible for scattering of `alpha`-particles.
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