In this study, the surface tension and surface coordination number of the molten metal using the Stephen equation calculated and reported. Parameters such as enthalpy of vaporization, density and surface tension of the parameters are required. Assumptions to predict the surface tension of molten metals such as minor changes in the volume of melting point similar to the melting point of the crystalline structure of liquid and solid, considering the increasing entropy, and no matter particles interact with particles in the second and third layers the surface is used. Results have shown that the surface coordination number of molten metal is in the range of 0.3 -0.7 of bulk coordination number. As well as being dependent surface coordination number on different parameters, such as temperature and lack of uniformity in terms of the calculation of various metals has made it difficult to compare the surface coordination number numbers. Also, different equations have been used to correlate the coordination number and adjustable parameters reported.