Copper (Cu)
Copper (Cu) is element 29 of the periodic table, a transition metal in period 4 and group 11. Its standard atomic weight is 63.546, so one mole of copper atoms has a mass of 63.546 g. At room temperature it is a solid; it melts at 1084.62 °C and boils at 2561.85 °C.
| Atomic number | 29 |
|---|---|
| Symbol | Cu |
| Standard atomic weight | 63.546 |
| Molar mass | 63.546 g/mol |
| Category | Transition metal |
| Group | 11 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 4s1 3d10 |
| Oxidation states | +2, +1 |
| Electronegativity (Pauling) | 1.9 |
| Atomic radius (van der Waals) | 140 pm |
| First ionisation energy | 7.726 eV (745.4 kJ/mol) |
| Electron affinity | 1.228 eV |
| State at room temperature | Solid |
| Melting point | 1357.77 K (1084.62 °C) |
| Boiling point | 2835 K (2561.85 °C) |
| Density | 8.933 g/cm³ |
| Discovered | Known since antiquity |
Group 11
Calculate with Copper
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.