Question

list 3 conclusions drawn by Rutherford from his alfa particle scattering experiment.state three features of nuclear model of an atom put forward byRutherford

Answer 1

Conclusions:
1. An extremely small positively charged particles are concentrated at the centre of the atom.
2. More number of electrons are revolving around the nucleus of the atom.
3. Most of the space is empty in an atom.

Features of the model:
1. An atom is electrically neutral.
2. Negatively charged particles, called electrons, revolve around the nucleus at very high speed.
3. Existence of nuclear forces of attraction on the electrons.

Answer 2

Conclusions drawn
1. The revolution of the electron in a circular orbit is not expected to be stable.
2. Any particle in a circular orbit would undergo acceleration. During acceleration, charged particles would radiate energy.
3. Thus the revolving electrons would lose energy and finally fall into the nucleus.
4. The atom should be highly unstable and hence matter would not exist in the form.


Features of nuclear model
1. There is a positively charge centre in an atom called 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.

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