The density dependence of the excess electron mobility mu(N) and the ground state energy V-0(N) are described within the framework of the pseudopotential theory for electrons in liquids with high polarizability. The theory is based on the experimentally known parameters only such as the scattering length of an isolated atom, the atomic polarizability and the radial distribution function of a liquid. Both mu(N) and V-0(N) as functions of the liquid density are calculated for liquid Ar, Kr, and Xe. The calculated nonmonotonic mu(N) and V-0(N) dependencies are compared with experimental data.