Question

Assertion :In Rutherford's $\alpha$-particle scattering experiment, most of the $\alpha$-particles were deflected by nearly ${180}^0$. Reason: The positive charge of the atom is spread throughout the atom that repelled and deflected the positively charged $\alpha$-particles.

• A. Assertion and reason both are correct statements and reason is correct explanation for assertion
• B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
• C. Assertion is correct statement but reason is wrong statement.
• D. Both Assertion and reason are incorrect

Answer 1

The correct option is D Both Assertion and reason are incorrect

In Rutherfourd's $\alpha$-particle scattering experiment most of the particles pass undeflected and very few are strongly deflected by nearly 180 degree. This led to the conclusion that most of the space in atom is empty and positive charge is concentrated in much smaller area called nucleus. This cause high repulsion to the positively charged $\alpha$-particles.

Both Assertion and Reason are incorrect