Young's Modulus, latent fusion heat and other properties of pure metals in relation to their position in subgroups and periods of the Periodic Table

摘要

The positions of metallic elements in the Periodic Table are associated with a similar magnitude sequence in the case of Young's modulus E, latent fusion heat L and specific heat capacity W (in units of energy concentration cal/cm{sup}3 or J/cm{sup}3). The determined magnitudes change simultaneously with increase of the atomic number AN in the periods and subgroups of the Periodic Table. The subgroups can be divided into three types according to the E vs. AN type of relation. In each type, the E-moduli of all metals are arranged in a continuously decreasing sequence of magnitudes and in groups of metals with closest magnitudes of E. In this case, the metals with higher E-magnitudes have higher L-magnitudes. In the case of metals with larger values of E-moduli (E > 400 GPa, Os, Ir, Re, Ru,W), the density and hardness are large and the thermal expansion coefficients small. The ratios L/W are similar for metals from the B-subgroup and with the same structure. The order of metallic elements in the Periodic Table is important not only for chemical properties, but also for physical and mechanical properties such as the bond forces, elastic coefficients E, G, B and PR, heat parameters L, W and L/W, thermal expansion coefficients and E- thermal coefficients, the electrical resistivity, hardness numbers, metal density etc. All the mentioned properties were considered in MP-reports of the author.