**Abstract:** A measurement of the simultaneous fall of seven solid chemical elements is performed in a vacuum from a height of 110 meters. Fall distance differences were observed relative to Al due to acceleration differences up to Δa_{Al,Li}/a_{Al} 0.045(1) % which explain the non-equivalence of and the inertial mass m_{j}^{i} and gravitational mass m_{j}^{g}. The result confirms m_{j}^{i} = m_{j}^{g} (1-Δ_{j}^{MD}/f) with a factor f = 6.7(4) whereby Δ_{j}^{MD} is the relative mass defect of isotopes, measured with mass spectrometers. A composition dependency of the Free Fall is also observed in the motions of planets in order of 0.15%. By an assumed second invariant property of the four stable elementary particles e, p, P and E (negative charged proton), the m^{g} of a body is proportional to its gravitational charge g_{m}= g m^{g} = g N (m_{P}-m_{e}) on one hand. On the other hand, the inertial mass is m^{i} = m^{g}– E_{B}/c² with E_{B}= m^{g} Δ^{MD} c². Newton’s law m^{i} a_{m} = –**G **M^{g} m^{g}/r²= – g_{M} g_{m}/4r² with the gravitational constant **G = **g²/4 corresponds solely to the static gravitational field, similar to Coulomb law of static electricity. Therefore, the Newtonian G = **G **M^{g}/ M^{i} m^{g}/m^{i} **G **(1+Δ^{MD} (M)+ Δ^{MD} (m)) is composition dependent.

PACS: 04.20.Cv, 04.80.Cc, 12.10.-g, 14.02.Dh