Bohr model

In the Bohr model of the hydrogen atom, what is the de-Broglie wavelength for the electron when it is in (a) the n=1 level? (b) Then n=4 level? In each case, compare the de-Broglie wavelength to the circumference 2pir_n of the orbit.

Why was a change in the Bohr Model of atom required? Due to which important development concept of movement of an electron in an orbit was replaced by the concept of probability of finding electron in an orbital?what is the name given to the changed model fo atom?

suppose an electron is attracted towards the origin by a force k//r , where k is a constant and r is the distance of the electron form the origin. By applying bohr model to this system, the radius of n^(th) orbit of the electron is found to be r_n and

Bohr's model can explain

Bohr's model of atom is not in agrement with

In Bohr's model of hydrogen atom ,

Bohr's model can explain

Which of the following are the limitation of Bohr's model ?

What are the postulates of Bohr's model of an atom?

Bohr's model is applicable to which ion?