Write a note about the energy of orbitals in hydrogen.

(N/A) The energy of an electron in a hydrogen atom is determined solely by the principal quantum number $(n)$. Thus,the energy of the orbitals increases as follows:
$1s < 2s = 2p < 3s = 3p = 3d < 4s = 4p = 4d = 4f < 5s = 5p = \dots$
Ground state of $H$: The $1s$ orbital in a hydrogen atom corresponds to the most stable condition and is called the ground state,and an electron residing in this orbital is most strongly held by the nucleus.
Excited state: An electron in the $2s, 2p$ or higher orbitals in a hydrogen atom is in an excited state.
An electron in an excited state is weakly attracted towards the nucleus. Ground state energy < Excited state energy.
The only electrical interaction present in the hydrogen atom is the attraction between the negatively charged electron and the positively charged nucleus; therefore,the subshell $(l)$ does not affect the orbital energy state.