Question

Deflection back of a few particles by large angle on hitting thin foil of gold in Rutherford's experiment showed that :

• A. nucleus is dense
• B. nucleus is small
• C. both A and B
• D. electrons create hinderance in the movement of $\alpha$-particles

Answer 1

The correct option is C both A and B

It was observed in Rutherford's experiment of gold foil that very few $\alpha$ particles were deflected back by large angles. The deflection of only a very few $\alpha$ particles helped him to conclude that the nucleus occupies very little space in an atom. He also concluded that the nucleus would be dense to deflect the $\alpha$ particles by large-angle.

Hence option C is correct.