According to Bohr's theory mention the expressions of the following parameters for hydrogen atom:
(i) radius of Bohr orbit, (ii) velocity of electron ,
(iii) orbital frequency of electron, (iv) angular momentum of electron, (v) kinetic energy of electron (iv) potential energy of electron.

The orbital angular momentum of a 2p-electron is

For d electron, the orbital angular momentum is

The angular momentum of electrons in d-orbital is equal to

For a d electron the orbital angular momentum is

The orbital angular momentum of p-electron is given by as

According to Bohr's model , the ratio of the energies of the electron in the first orbit of hydrogen atom and He^(+) atom is

According to Bohr's theory the angular momentum for an electron of fifth orbit is

Angular momentum of an electron in the 'n' the orbit is_____.

The oribital angular momentum of an electron is 2s orbital is

(i) For an atom of an element having atomic number Z, find the expression of the following parameter in SI unit : (a) radius of the n-th Bohr orbit ( r_n) (b) Velocity of the electron in n-th orbit (v_n) ( c ) Total energy of the electron in n-th orbit (E_n) Given , in_0 =permittivity of free space, m=mass of electron, e= charge of electron and h =Planck's constnat)