29Cu63.546
Copper (Cu)
Element 29 Ā· Transition metal
Copper (Cu) is a chemical element with atomic number 29. It is classified as a transition metal in period 4, group 11 of the periodic table (the d-block). Its standard atomic weight is 63.546 u and its ground-state electron configuration is [Ar] 3dĀ¹ā° 4sĀ¹.
Copper facts
| Atomic number (Z) | 29 |
|---|---|
| Symbol | Cu |
| Standard atomic weight | 63.546 u |
| Category | Transition metal |
| Group | 11 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3dĀ¹ā° 4sĀ¹ |
| Electronegativity (Pauling) | 1.9 |
| State at 20 Ā°C | Solid |
| Protons / electrons | 29 / 29 |
| Neutrons (most common isotope, approx.) | 35 |
| Molar mass | 63.546 g/mol |