The alkali (both mono and bialkali) silicate glasses were investigated The coefficients of temperature dependencies in Vogel-Fulcher-Tammann's equations for glass melt viscosity and electrical resistivity above glass transition region, coefficients for temperature dependencies of conductivity below glass transition region, equilibrium and isostructural coefficients of the linear expansion were defined by data manipulation. The main idea of the paper was to compare main parameters of structural relaxation (ratio of viscosity to Kohlrausch's relaxation time and stretched exponent) of two properties of glass: density (or length) and electrical conductivity These parameters were calculated by special programs fitted experimental results and minimized the mean square root functional. Obtained values give a basis for a new discussion on the influence of glass composition on the structural relaxation kinetics.