2.18 In a hydrogen atom, the electron and proton are bound at a distance of about
(a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at an infinite separation of the electron from proton
As we know,
the distance between electron-proton of the hydrogen atom
The potential energy of the system = potential energy at infinity - potential energy at distance d
As we know,
Hence potential energy of the system is -27.2eV.