Question

When a gold sheet is bombarded by a beam of $\alpha$ -particles, only a few of them get deflected whereas most go straight, undeflected. This is because

• A. the force of attraction exerted on the $\alpha$ -particles by the oppositely charged electrons is not sufficient
• B. a nucleus has a much smaller volume than that of an atom
• C. the force of repulsion acting on the fast-moving $\alpha$ - particles is very small
• D. the neutrons in the nucleus do not have any effect on the $\alpha$ - particles

Answer 1

The correct option is B a nucleus has a much smaller volume than that of an atom

Due ti small size of nucleus as compare to atom most of the $\alpha$ particle goes straight, some got very little deflection & 1 in 20,000 rebounds back.
So Ans (2)