Which energy level does not have p-orbital?

A gas of identical hydrogen-like atoms has some atoms in the lowest in lower (ground) energy level A and some atoms in a partical upper (excited) energy level B and there are no atoms in any other energy level.The atoms of the gas make transition to higher energy level by absorbing monochromatic light of photon energy 2.7 e V . Subsequenty , the atom emit radiation of only six different photon energies. Some of the emitted photons have energy 2.7 e V some have energy more , and some have less than 2.7 e V . a Find the principal quantum number of the intially excited level B b Find the ionization energy for the gas atoms. c Find the maximum and the minimum energies of the emitted photons.

When electron transist from higher energy level to lower energy level then …..

Which of the following does not have the dimensions of force?

Below are shown the energy levels for a particular atom. A photon with wavelength is emitted when the system transist from the fourth energy level (4E) to the first energy level (E). When the system transist from the (7)/(3)E energy level to E energy level photons emitted with wavelength lamda_(2) , then (lamda_(1))/(lamda_(2))=.......

The energy level diagram is for a hypotenitcal atom. A gas of these atoms incitially in the ground state is irrediated with photons having a continuous range of energies between 7 and 10 electron volts. One would expect photons of which of the following energies to be emiited from the gas ?

On which the mechanical energy depends? And does not depend?