write the postulates of bhor s atomic model regarding electrons.(3)
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The postulates of Bohr's atomic model are:
- Electrons (negatively charged) in an atom orbit around the positively charged nucleus in a specific circular path.
- These circular orbits are known as orbital shells because each orbit or shell has defined energy.
- The quantum number is an integer (n=1, 2, 3,...) that represents the energy levels. This quantum number range begins on the nucleus's side, with n=1 having the lowest energy level. K, L, M, N.... shells are given to the orbits n=1, 2, 3, 4..., and an electron is considered to be in the ground state when it reaches the lowest energy level.
- An electron in an atom gains energy to go from a lower energy level to a higher energy level, and an electron loses energy to move from a higher energy level to a lower energy level.
Explanation:
The Bohr theory is a theory proposed by Niels Bohr. The atomic structure model was modified by stating that electrons move in fixed orbitals (shells) and not everywhere in between, and that each orbit (shell) has a fixed energy level. Rutherford essentially explained how an atom's nucleus works, and Bohr expanded that model to include electrons and their energy levels.
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