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29
Cu
63.546
Copper
Transition metals · Group 11 · Period 4
Copper combines high electrical and thermal conductivity with ductility and corrosion resistance, which is why it remains the reference metal for wiring, electronics and vacuum equipment. For ultra-pure material, our copper powder guide covers every grade from 2N (99%) to 7N (99.99999%), each with its typical trace-impurity analysis and applications.
Atomic properties
| Atomic number | 29 |
|---|---|
| Symbol | Cu |
| Standard atomic weight | 63.546 |
| Classification | Transition metals |
| Group | 11 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3d10 4s1 |
| Electronegativity (Pauling) | 1.90 |
| Common oxidation states | +2, +1 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 8.96 g/cm³ |
| Melting point | 1084.62 °C |
| Boiling point | 2562 °C |
| Discovered | Ancient |
| CAS number | 7440-50-8 |
Reference guides for this element
Six-nines copper powder (Cu ≥ 99.9999%, metals basis) — lot specification and analysis scope confirmed in writing.
Copper Powder 99.9999%