Write a short note about Niels Bohr's atomic model.
GSEB - Class 9 Chapter - 5.Structure of Atom Page 66
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Neils Bohr suggested that the electrons revolve around the nucleus and carry negative charge whereas protons and neutrons are found inside nucleus in which protons have positive charge and neutrons are neutral
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Heya friend!
In the view of Rutherford atom model, Niels Bohr came to the conclusion that classical mechanics could not be applied to the processes of atomic scale.
Bohr cleverly combined classical ideas and early quantum concepts given by Planck to give what is known as BOHR MODEL OF HYDROGEN ATOM.
Following are the three basic postulates of this model:
1. Every atom consists of a central core called nucleus, in which entire positive charge and almost entire mass of an atom are concentrated.
A suitable number of electrons revolve around the nucleus in circular orbits.
The centripetal force required for revolution is provided by the electrostatic force of attraction between the electron and the nucleus.
2. According to Bohr, electronic can revolve only in certain discrete non radiating orbits, called stationary orbits, foe which total angular momentum of the revolving electron is an integral multiple of h/2pi, where h is Planck's constant.
3. The emission/absorption of energy occurs only when an electron jumps from one of its specified non-radiating orbits to another. The difference in the total energy of electron in the two permitted orbits is absorbed when the electron jumps from an inner to an outer orbit, and emitted when electron jumps from outer to inner orbit.
HOPE IT HELPS...
In the view of Rutherford atom model, Niels Bohr came to the conclusion that classical mechanics could not be applied to the processes of atomic scale.
Bohr cleverly combined classical ideas and early quantum concepts given by Planck to give what is known as BOHR MODEL OF HYDROGEN ATOM.
Following are the three basic postulates of this model:
1. Every atom consists of a central core called nucleus, in which entire positive charge and almost entire mass of an atom are concentrated.
A suitable number of electrons revolve around the nucleus in circular orbits.
The centripetal force required for revolution is provided by the electrostatic force of attraction between the electron and the nucleus.
2. According to Bohr, electronic can revolve only in certain discrete non radiating orbits, called stationary orbits, foe which total angular momentum of the revolving electron is an integral multiple of h/2pi, where h is Planck's constant.
3. The emission/absorption of energy occurs only when an electron jumps from one of its specified non-radiating orbits to another. The difference in the total energy of electron in the two permitted orbits is absorbed when the electron jumps from an inner to an outer orbit, and emitted when electron jumps from outer to inner orbit.
HOPE IT HELPS...
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