Question

give the assumption of Alpha particles to indicate the trajectory?​

Answer 1

Answer:

The trajectory traced by an α-particle depends on the impact parameter,b of collision. ... The fact that only a small fraction of the number of incident particles rebound back indicates that the number of α-particles undergoing head on collision is small.

Answer 2

Explanation:

By the alpha particles scattering theory the following observations were made.

1.most of the fast moving alpha particles passed straight through the gold foil.

2.some of the alpha particles were deflected by the foil by small angles.

3.surprisingly one out of every 12000particles appear to rebound.

Conclusion of the experiment

1. there is a positively charged centre in an atom called the nucleus. Nearly all the mass of an atom resides in the nucleus.

2.the electrons revolve around the nucleus in circular paths

3.the size of the nucleus is very small as compared to the size of the atom