# Elastic scattering of neutrinos on atomic electrons

In the elastic scattering of neutrinos on atomic electrons, why can tau and muon neutrinos only interact via weak neutral currents but electron neutrinos can interact with W or Z bosons?

In a charged current interaction the neutrino transforms into its partner lepton and a W particle. By partner lepton I mean the lepton of the same flavour. So for $\nu_e$ $e$ scattering we get: