Question

State three postulates of Bohr's atomic model.

Answer 1

1.the electrones revolving around the nucleus are confined to fixed orbits called shells each of which is associated with a fixed amount of energy 2.while it is revolving around the nucleus in an orbit an electrones neither loses nor gains energy 3.an electrones revolving in a particular orbit on gaining a certain amount of energy jump to next orbit and vice versa since each orbit is associated with a fixed amount of energy board called it an energy level

Answer 2

Answer:

Neil Bohr put forward the Bohr model of the atom in 1915. It was created by the modification of Rutherford's atomic model. In his nuclear model of an atom, Rutherford showed how a positively charged nucleus is surrounded by negatively charged electrons.

Explanation:

Bohr's Atomic Model Postulates:

1. In an atom, negatively charged electrons travel in fixed circular paths around the positively charged nucleus that are referred to as orbits or shells.
2. These circular orbits are referred to as orbital shells because each orbit or shell has defined energy.
3. The quantum number which is an integer is used to indicate the energy levels. The lowest energy level in this quantum number range, n=1, lies on the nucleus side. When an electron reaches the lowest energy level, it is referred to as being in the ground state. The orbits n=1, 2, 3, 4... are allocated as K, L, M, N.... shells.
4. A lower energy level to a higher energy level is reached by an atom's electrons by obtaining the necessary energy, and a higher energy level to a lower energy level by losing energy.

Limitations of Bohr's Atom Model

1. Bohr's atomic model was unable to account for the Zeeman Effect (effect of magnetic field on the spectra of atoms).
2. Additionally, the Stark effect was left unexplained (effect of electric field on the spectra of atoms).
3. The Heisenberg Uncertainty Principle is broken.
4. The spectra obtained from bigger atoms could not be explained by it.

Hence, the 3 postulates of Bohr's atomic model have explained above.

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