29Cu63.546
Transition Metald-block
Copper
Element 29 on the periodic table, symbol Cu, group 11, period 4.
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.
Appearance: red-orange metallic luster
Properties
- Atomic Number
- 29
- Atomic Mass
- 63.5463 u
- Group
- 11
- Period
- 4
- Block
- d-block
- Category
- Transition Metal
- State at 25 °C
- Solid
- Melting Point
- 1,357.8 K · 1,084.6 °C
- Boiling Point
- 2,835 K · 2,561.9 °C
- Density
- 8.96 g/cm³
- Atomic Radius
- 135 pm
- Electronegativity
- 1.9
- Oxidation States
- +1, +2
- Abundance in Crust
- 60 mg/kg
- Discovered
- Known since antiquity
- Discovered By
- Middle East
Electron Configuration
[Ar] 3d10 4s1
1s2 2s2 2p6 3s2 3p6 4s1 3d10
Ionisation Energies (kJ/mol)
- 1. 745.5
- 2. 1,957.9
- 3. 3,555
- 4. 5,536
- 5. 7,700
- 6. 9,900
- 7. 13,400
- 8. 16,000
Elements near Copper
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.