* Electrostatic Repulsion: Since both the alpha particle and the nucleus are positively charged, they experience a strong electrostatic repulsion. This means they push each other away.
* Trajectory Deflection: The alpha particle's path will be deflected. The closer it gets to the nucleus, the stronger the repulsive force and the greater the deflection.
* Possible Outcomes:
* Scattering: The alpha particle might be deflected at a large angle and continue on a new path.
* Rebound: In some cases, the alpha particle might have enough energy to overcome the repulsion and come very close to the nucleus, but then be repelled back with a high speed.
* Nuclear Reaction (rare): In very rare instances, the alpha particle might have enough energy to overcome the repulsion and actually collide with the nucleus. This could lead to a nuclear reaction.
Important Considerations:
* Energy: The outcome depends heavily on the alpha particle's kinetic energy (its energy of motion). If it has a high enough energy, it might be able to overcome the repulsion and interact with the nucleus. If it has low energy, it will be scattered away with a smaller deflection.
* Nuclear Size: The size of the nucleus also plays a role. Larger nuclei have a stronger electrostatic field, making it more difficult for the alpha particle to approach.
Historical Significance:
The scattering of alpha particles by nuclei was a key experiment that led to the development of the Rutherford model of the atom. It demonstrated that atoms have a small, dense, positively charged nucleus, surrounded by a cloud of negatively charged electrons.
