Question

According to Rutherford's model of an atom:

• A. There is a positively charged centre in an atom called the nucleus.
• B. Electrons never lose or gain energy.
• C. The electrons revolve around the nucleus in circular paths.
• D. Electrons do not move at all.

Answer 1

Answer: (A), (C)

There is a positively charged centre in an atom called the nucleus.

The electrons revolve around the nucleus in circular paths.

According to Rutherford's model of an atom:

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.

The revolution of the electron in a circular orbit is not expected to be stable. Any particle in a circular orbit would undergo acceleration. During acceleration, charged particles would radiate(lose) energy.