The Boht's atomic model was based upon the following postulates:
1- The hydrogen atom consists of a tiny nucleus and electron are revolving in one of circular orbits of radius `r' around the nucleus.
2- Each orbit has a fixed energy that is quantized.
3- As long as electron remains in a particularorbit, it does ntoradiate or absorb energy. The energy is emitted or absorbed only when and electron jumps from one orbit to another.
4- When an electron jumps from lower orbit to higher orbit, it absorbs energy and when it jumps from higher orbit to lower orbit it radiates energy. This change in energy,▲E is given by following Planck'sequation
▲E = E2 - E1 = hV
Where h is planck'sconstant equal to 6.63x 10-34 Js, and v is frequency of light.
5- Electron can revolve only in orbits of a fixed anglar moment mvr, given as:
mvr= n h/2π
Where `n' is the quantum number ororbit number having values
1, 2, 3, 4, 5, and so on.