Question

The scattering of a stream of positively charged particles when striking a thin film of gold confirms that

Answer 1

This was Ernest Rutherford’s gold foil experiment. He used radioactive alpha particles as a part of the experiment and discovered that there was a densely packed, positively charged nucleus in atoms with electrons that were spread out in spaces between nuclei.

Answer 2

Most of space of atom is empty and in center of atom , there is solid mass which is cause of alpha particles to come back. He gave the term nucleus to this solid mass.

Step-by-step explanation:

Ernest Rutherford conducted experiment in which he took a thin gold particle film on which he passes alpha- particles. He noticed that:

1. Most of the alpha particles get through film and can be detected by detector.
2. Around small portion of the alpha particle deflected at small angles.
3. A very very few alpha particle (approximately 1 out of 1 million alpha particles) just retraced their path which means come back from the center.

He concluded that:

Most of space of atom is empty and in center of atom , there is solid mass which is cause of alpha particles to come back. He gave the term nucleus to this solid mass.