29 Cu
Transition metal
Copper
Excellent electrical conductor.
Properties of Copper
- Atomic number (Z)
- 29
- Symbol
- Cu
- Atomic mass
- 63.546 g/mol
- Category
- Transition metal
- Group
- 11
- Period
- 4
- Electron configuration
- [Ar] 3d¹⁰ 4s¹
- Electronegativity (Pauling)
- 1.9
- Atomic radius
- 145 pm
- First ionization energy
- 745 kJ/mol
- Melting point
- 1357.77 K (1084.6 °C)
- Boiling point
- 2835 K (2561.8 °C)
- Density
- 8.96 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Known since ancient times