Question

Bohr's atomic model is based on the following postulates:

• A. an atom consists of nucleus.
• B. an electron can rotate only in certain energy levels.
• C. an electron remains moving with continuous loss of energy.
• D. none of the above.

Answer 1

Answer: (A), (B)

The correct options are
A an atom consists of nucleus.
B an electron can rotate only in certain energy levels.

A) According to Bohr's atomic model an atom consists of nucleus at its center,in which protons and neutrons are present,which are together called as mass number(A).
B) According to Bohr's atomic model an electron revolves round the nucleus in purticular circular paths called energy levels or orbits.
C) Statement C is not correct statement because according to Bohr's atomic model as long as the electron revolves round the nucleus in a purticular energy level it doesnt loss energy,hence the enegy levels are called stationary energy levels or stationary orbits.
Hence option A & B are correct.