Assertion :Most of the mass of the atom is concentrated in its nucleus. Reason: All alpha particles striking a gold sheet are scattered in different directions.

Question

Assertion :Most of the mass of the atom is concentrated in its nucleus. Reason: All alpha particles striking a gold sheet are scattered in different directions. (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 both assertion and reason are false

Tardigrade Admin · Accepted Answer

The results of α-particle scattering experiment showed that most of the mass of the atom is concentrated in its nucleus. Not all but only high energy α-particles are scattered when they strike an extremely thin foil of metal and passing through nucleus.

Q. Assertion :Most of the mass of the atom is concentrated in its nucleus.
Reason : All alpha particles striking a gold sheet are scattered in different directions.

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

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

If assertion is true but reason is false

If both assertion and reason are false

The results of $α$ -particle scattering experiment showed that most of the mass of the atom is concentrated in its nucleus. Not all but only high energy $α$ -particles are scattered when they strike an extremely thin foil of metal and passing through nucleus.

Q. Assertion :Most of the mass of the atom is concentrated in its nucleus. Reason : All alpha particles striking a gold sheet are scattered in different directions.