按周期表位置排列的8个贵金属元素的物理性质，归纳出三种类型的规律，即原子半径相近，密度与比热接近倍比；熔点、沸点、硬度及其它力学性质呈线性变化；热导率和电导率呈不规则变化。文章用价键理论从原子结构特征对产生三类规律的原因进行了讨论。

Through arranging the physical properties of the eight precious metals in accordance with their positions in the Periodic Table, three laws can be obtained： their atomic radii are close to each other and the density and specific heat nearly obey the relation of multiple proportions; melting point, boiling point, hardness and other mechanic properties vary linearly; electrical conductivity and heat conductivity vary irregularly. The cause of these three laws is analyzed by aid of the valence bond theory on the basis of atomic structure characteristics.