Question

Which of the following observations of $\alpha$-ray scattering experiment led to the discovery of a 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. Most of the $\alpha$-particles rebounded

Answer 1

The correct option is C Only a few $\alpha$-particles deflected away from their path

As very few particles deflected away from the path it was clear that the (positive) region responsible for this deviation is very small. This was named as nucleus by Rutherford. Thus discovery of nucleus was done because very few $\alpha$-particles deflected away from their path.