The electron energy in hydrogen atom is given by `E_(n) = (-2,18 xx 10^(18)) //m^(2) n^(2)J` Calculate the energy required to remove an electron completely from the n=2 orbit .What is the longest wavelength of ligth in cm that can be used to cause this transitiion ?

Explanation

`6.839 xx 10^(5) J mol^(1)`