pages for more information! Find out more about the company LUMITOS and our team. The high density of most metals is due to the tightly packed crystal lattice of the metallic structure. Excel App. 117 Btu / (hr-ft-F) x .04395 watt-hr-F-ft/(Btu=°C - in) = 5.14 watts/in-°C. The alkali and alkaline earth metals in groups I A and II A are referred to as the light metals because they have low density, low hardness, and low melting points. Thermal Conductivity - k - is used in the Fourier's equation. Sheets of metal beyond a few micrometres in thickness appear opaque, but gold leaf transmits green light. | Feedback | Advertising = 5.14 watts/in - °C Generally speaking, dense materials such as metals and stone are good conductors of heat, while low density substances such as gas and porous insulation are poor conductors of heat. The strength of metallic bonds for different metals reaches a maximum around the center of the transition metal series, as those elements have large amounts of delocalized electrons in tight binding type metallic bonds. ; Conductive … Although most metals have higher densities than most nonmetals, there is wide variation in their densities, Lithium being the least dense solid element and osmium the densest. document.write('