postulates and limitations of Bohr model
.............. atlease 4 -4 points each not to explain so much just give points
Answers
1. In an atom, the electrons revolve around the nucleus in certain definite circular paths called orbits, or shells.
2. Each shell or orbit corresponds to a definite energy. Therefore, these circular orbits are also known as energy levels or energy shells.
3. The orbits or energy levels are characterized by an integer
4. The electrons present in an atom can move from a lower energy level (Elower) to a level of higher energy (Ehigher) by absorbing the appropriate energy
Drawbacks of Bohr's model are-
1. It violates the Heisenberg Uncertainty Principle
2. The Bohr atomic model theory made correct predictions for smaller sized atoms like hydrogen, but poor spectral predictions are obtained when larger atoms are considered.
3. It failed to explain the Zeeman effect when the spectral line is split into several components in the presence of a magnetic field.
4. It failed to explain the Stark effect when the spectral line gets split up into fine lines in the presence of electric field.
Answer:
HERE IS YOUR ANSWER
Explanation:
The postulates of Bohr’s atomic model are:-
1. According to Bohr's theory, electrons revolve in definite circular orbits around the nucleus and these orbits are designated by the letters K, L, M, N or by the numbers 1, 2, 3, 4 and so on.
2. As long as the electrons revolve in a particular orbit they can neither gain energy nor lose energy. Such orbits are called stationary orbits or stationary states.
3. When an electron jumps from a higher orbit to a lower orbit it releases energy in the form of radiations and when an electron jumps from lower orbit to a higher orbit it absorbs energy in the form of radiations.
4. The angular momentum of an electron is an integral multiple of h/ 2π mvr = nh/ 2π
5. It explains the stability of an atom and also the line spectrum of the hydrogen atom
HOPE IT HELPS YOU