Question

Explain the first model of an atom based on Quantisation of energy

Answer 1

Answer:

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Your answer is as follows:

The basic hypothesis of Bohr's model was the quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.

Explanation:

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Answer 2

Answer:

Quantization means that a quantity cannot vary continuously to have any arbitrary values but can change only discontinuously to have some specific values.Bohr was the first person person to explain the structure of atom based on the quantisation of energy levels.

Bohr’s Model of Atom

In 1913, Bohr put forward the theory based on quantization of energy to postulate the structure of atom. The basic hypothesis of Bohr's model was the quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy. The energy of an electron depends on the size of the orbit and is lower for smaller orbits.  

Now, according to the Bohr's model, an electron in an atom can be present only in those orbits in which angular momentum of the electron is whole number multiple of h/2π. Moreover, these orbits are associated with the definite amount of energy.

Hence the electron in an atom can have only definite values of energy that is energy of the electron in an atom is quantised.

Radiation can occur only when the electron jumps from one orbit to another. The atom will be completely stable in the state with the smallest orbit, since there is no orbit of lower energy into which the electron can jump.

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