R-MATRIX CALCULATION OF ELASTIC ELECTRON-MAGNESIUM SCATTERING V.Gedeon*, V.Lengyel*, O.Zatsarinny**, C.Kocher*** *Uzhgorod State University, Department of Theoretical Physics, Uzhgorod 294000, Ukraine ** Institute of Electron Physics, Universitetska 21, Uzhgorod 294016, Ukraine (zoi@iep.uzhgorod.ua) ***Oregon State University, Department o Physics, Corvallis, OR 97331 USA We use the R-matrix with pseudo-states in 19-state close-coupling approximation with expansion included the 13 physical target states and 6 pseudo-states for the calculation of electron-impact excitation integral cross section in neutral Mg. It was obtained the excelent agreement with existing absolute measurements of total cross sections, including the position of two peaks which we interpretate as the p- and d-shape resonances.