Write down a general expression for the energy of the photon required to excite a hydrogen-like atom with nuclear charge Z from the ground state to the first excited state. Calculate the energies and wavelengths of the photons needed to excite the ground state species H, He+ and Li2+. In what region of the electromagnetic spectrum are the photons?

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.