Two-electron atom
= Two-electron atom
{wiki=Two-electron_atom}
A two-electron atom is an atomic system that contains two electrons orbiting around a nucleus, which is typically a single positive charge, such as the nucleus of a helium atom (\\( ^4He \\)). In contrast to hydrogen (which has only one electron), a two-electron atom has additional complexities in its electronic structure due to the interactions between the two electrons.