Question

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Q.what are the postulates of Bohr's atomic model???


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Answer 1

1) Each orbit or shell has a fixed energy and these circular orbits are known as orbital shells.

2) The energy levels are represented by an integer (n=1, 2, 3…) known as the quantum number. This range of quantum number starts from nucleus side with n=1 having the lowest energy level. The orbits n=1, 2, 3, 4… are assigned as K, L, M, N…. shells and when an electron attains the lowest energy level it is said to be in the ground state.

3) The electrons in an atom move from a lower energy level to a higher energy level by gaining the required energy and an electron moves from a higher energy level to lower energy level by losing energy.

Answer 2

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✿ The Main Postulates of Bhor's Atomic Model are :

1. Electrons move around the nucleus in circular orbits and they don't emit energy. They are called non radiating path or stable orbit.

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 electron goes from higher orbit to lower orbit, there is emission of energy but when it goes from lower to higher orbit, energy is absorbed in terms of photon (hv) i.e. E2-E1=hv

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