A one-electron atom is an atom with Z protons in the nucleus and with all but one of its electrons lost to ionization.
(a) Starting with Coulomb's law, determine expressions for the orbital radii and energies for a Bohr model of the one-electron atom with Z protons.
(b) Find the radius of the ground-state orbit, the ground-state energy, and the ionization energy of singly ionized helium (He II).
(c) Repeat part (b) for doubly ionized lithium (Li III).