Copper (Cu) — Element 29: Properties & Data | Aladdin Scientific
Copper(Cu) — Element 29
Copper (Cu) is a transition metal with atomic number 29 and atomic mass 63.55. It has melting point 1357.77 K (1085 °C), boiling point 2835 K (2562 °C), density 8.933 g/cm³. It sits in group 11 and period 4 of the periodic table and has been known since antiquity.
Key facts
| Atomic mass | 63.5500 u |
|---|---|
| Electron configuration | [Ar]4s1 3d10 |
| Oxidation states | +2, +1 |
| Electronegativity (Pauling) | 1.9 |
| Atomic radius (van der Waals) | 140 pm |
| Ionization energy | 7.726 eV |
| Electron affinity | 1.228 eV |
| Melting point | 1357.77 K |
| Boiling point | 2835 K |
| Density | 8.933 g/cm³ |
| Standard state | Solid |
| Year discovered | Ancient |
Frequently asked questions
What is the electron configuration of copper?
The ground-state electron configuration of copper is [Ar]4s1 3d10.
What group and period is copper in?
Copper (Cu) is in group 11 and period 4 of the periodic table, classified as a transition metal.
What is the melting point of copper?
Copper melts at 1357.77 K (1085 °C).
What is the standard state of copper?
Copper is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .