Question

$\propto$-particles are scattered by the gold nucleus but not by the electrons.
It is, because

• A. Electrons are much massive than$\propto$ particles
• B. $\propto$-particles are massive than electrons but only about 2% massive for gold nucleus.
• C. $\propto$particles are nearly of same mass or that of nucleus
• D. $\propto$particles are positively charged.

Answer 1

The correct option is D $\propto$particles are positively charged.

Alpha particle get scattered due to $repulsion$ by $positive$ nucleus not due to heavy mass because $\alpha \text{particle is positively charged}$

The scene of mass is considered only for mechanical scattering where collision takes place in our case the $\alpha$ particle doesn't touch nucleus it just reaches up to closest distance.

Option D is correct.