What is covalency of Xe in third excited state

The covalency of sulphur in second excited state will be :

The innermost orbits of a hydrogen atom is 5.3xx10^(-11) m. What is the radius of the orbit in third excited state ?

The electron in hydrogen atom is initially in the third excited state. What is the maximum number of spectral lines which can be emitted, when it finally moves to the ground state?

A sample of monatomic hydrogen gas contains n atoms all in third excited state. Find the minimum value of n so that on subsequent de-excitation, all positive different energy photons are emitted.

What is covalency of chlorine atom in second excited state ?

The ratio of energies of hydrogen atom in its first excited state to third excited state is

The number of different wavelengths may be observed in the spectrum from a hydrogen sample if the atoms are excited to third excited state is