Question

Which of the following observations of $\alpha$-ray scattering experiment lead to the presence of small positively charged nucleus in the centre?

• A. Most of the $\alpha$-particles passed straight
• B. Most of the $\alpha$-particles rebounded after hitting the atoms
• C. Only a few $\alpha$-particles deflected away from their path
• D. Very few $\alpha$-particles rebounded

Answer 1

Answer: (A), (C), (D)

Most of the $\alpha$-particles passed straight
Very few $\alpha$-particles rebounded
Only a few $\alpha$-particles deflected away from their path

Following are the observations which conclude the presence of the nucleus at the center of the atom:

1) Some of the alpha rays are deflected back with some angle. (presence of nucleus)

2) Very few alpha particles are bounced back with zero-degree angles.(Alpha rays hit the center of the nucleus)

Hence option $A,C,D$ are correct.