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प्रश्न
Give the postulates of Bohr's atomic model
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उत्तर
Atom has a central nucleus surrounded by electrons.
The electrons revolve around the nucleus in definite circular paths called orbits.
Each orbit has fixed energy. Therefore, these orbits are also known as energy levels or energy shells.
These orbits or energy levels are represented either by a number 1, 2, 3,... known as the principal quantum number (n) of the orbit or by K, L, M,....
There is no change of energy of electrons as long as they keep revolving in the same energy level and the atom remains stable. Electrons can jump from the higher orbit to the lower orbit when they lose energy and jump to the next when they gain energy.
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संबंधित प्रश्न
Draw a sketch of Bohr’s model of an atom with three shells.
Describe Bohr’s model of the atom.
Name the scientists who described the arrangement of electrons in an atom.
Describe Bohr's model of the atom. How did Neils Bohr explain the stability of atom?
State true or false. If false, correct the statement.
Smaller the size of the orbit, lower is the energy of the orbit.
Which of the following in Fig. 4.2 do not represent Bohr’s model of an atom correctly?
Niels Bohr was Born on ______.
The atomic model based on quantum theory was first proposed by ______.
Given below are two statements:
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
The angular momentum of electron in hydrogen atom in first orbit is ‘L’. The change in angular momentum if electron is in second orbit of hydrogen atom is ______.
