What is the sequence of energies of 3s, 3p and 3d - orbtials in a hydrogen atom.

What is the diameter of hydrogen atom?

What is the diameter of Hydrogen atom?

The energy of an electron in nth orbit of hydrogen atom is

Determine the speed of the electron in the n=3 orbit of hydrogen atom.

What is the wavelength of light emitted when the electron in hydrogen atom undergoes transition from an energy level with n = 6 to an energy level with n = 3 ?

The correct order of closeness of 3s,3p,3d orbitals of nucleus is :

What is the atomic number of hydrogen?

State Bohr’s postulates for hydrogen atom.

On the basis of Bohr’s theory, derive an expression for binding the energy of an electron in a hydrogen atom.