29Solid
Cu 63.546 Atomic mass · uTransition metals
Copper
Copper is a chemical element with symbol Cu (from Latin:cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color.
Discovery Ancient (Middle East)
K2L8M18N1
Physical properties
Values for the element in its standard state.
- Density
- 8.92g/cm³
- Melting point
- 1,358K
- Boiling point
- 3,200K
- Atomic radius
- 138pm
- Bonding type
- Metallic
- Molar heat
- 24.44J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 1 electrons;
[Ar] represents 18 core electrons. The full view shows them explicitly.
29 electrons Orbital order preserved from source
- Electronegativity
- 1.9Pauling scale
- First ionization energy
- 746kJ/mol
- Electron affinity
- 118kJ/mol
- Van der Waals radius
- 140pm
Cu CopperAtomic number 29
746kJ/mol
Atomic numberGaps indicate unavailable data
About copper
- Appearance
- Red-orange metallic luster
- Discovery
- Ancient (Middle East)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.