Name: Copper Symbol: Cu Atomic Number: 29 Atomic Weight: 63.546(3) Density: 8.96 g/cc Melting Point: 1083.45 C Boiling Point: 2566.85 C Electron Configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s1 Chemical Group: Transition Metals Detailed Technical Data The data on this page is more precise and in some cases more up-to-date than the data engraved on the wooden tiles. But as always, never believe one source if the number really matters. Density, melting point and boiling point data is particularly variable and uncertain. Atomic weight data for stable elements from IUPAC 1999 Official Publication. (Uncertainty in parentheses.) Special notes for this element from IUPAC publication: Range in isotopic composition of normal terrestrial material prevents a more precise Ar(E) being given; the tabulated Ar(E) value should be applicable to any normal material.