# Answer to Question #9906 in Physical Chemistry for momo

Question #9906

how to find radius in bohr atomic model???

Expert's answer

The Bohr radius is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. The precise definition of the Bohr radius is:

a

where:

h is the reduced Planck's constant

me is the electron rest mass

e is the elementary charge

c is the speed of light in vacuum

K is the fine structure constant.

a

_{0}= 4п*є*_{0}h^{2}/ m_{e}e^{2}= h/m_{e}c Kwhere:

*є*_{0}is the permittivity of free spaceh is the reduced Planck's constant

me is the electron rest mass

e is the elementary charge

c is the speed of light in vacuum

K is the fine structure constant.

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