Lesson #14 Results of Rutherford's atomic model:

Conclusions of rutherford atomic model:

1.Since majority of the a- particles passed through the foil undeflected, most of soace occupied byan atom must be empty.

2.The deflection of a few a- particles through angles greater than 90° shows that these particles are deflected by electrostatic repulsion between the positively charged a- particle and the positively charged part of atom.

3.Massive a- particles are not deflected by electrons

Defects of rutherford atomic model:

Rutherford's model of an atom resembles our solar system. It has following defects:

1.Classical physice suggests that electron being charged particle will emit energy continuously while revolving around the nucleus. Thus the orbit of the revolving electron becomes smaller and smaller until it would fall into the nucleus. This would collapse the atomic structure.

2.If revolving electron emits energy continuously it should form a continuous spectrum for aline spectrum is obtained