Cu
Copper Symbol (Cu)
Copper is element 29 of the periodic table. Copy its symbol Cu and see its atomic weight, electron configuration and common compounds.
What does Cu mean?
Cu is the chemical symbol for copper, element number 29 in the periodic table. Copper is a transition metal in group 11, period 4. It is an excellent electrical conductor used in wiring and plumbing; its symbol Cu comes from the Latin cuprum.
Codes and properties
| Chemical symbol | Cu |
|---|---|
| Atomic number (Z) | 29 |
| Atomic weight (PubChem) | 63.55 |
| Group / period | 11 / 4 |
| Element category | transition metal |
| Electron configuration | [Ar]4s¹ 3d¹⁰ |
| State at 20 °C | Solid |
| Oxidation states | +2, +1 |
| Electronegativity (Pauling) | 1.9 |
| Melting point | 1357.77 K (1084.62 °C) |
| Boiling point | 2835 K (2561.85 °C) |
| Density | 8.933 g/cm³ |
| Discovered | Known since ancient times |
| Common compounds | CuSO₄, CuO, Cu₂O |
How to type Cu
- Plain text: type
Cu— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as CuSO₄ — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Cu}in math mode, or use the mhchem package:\ce{Cu}. - HTML:
Cu; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for copper?
The chemical symbol for copper is Cu.
What is the atomic number of copper?
Copper has atomic number 29, meaning each atom has 29 protons.
What is the electron configuration of copper?
The ground-state electron configuration of copper is [Ar]4s¹ 3d¹⁰.
Related symbols
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Reference: Copper on PubChem (NIH)