29Cu63.55
Copper
Transition Metal
Solid at STP
Period 4Group 11Block DDiscovered Ancient
[Ar]4s1 3d10
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.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 29 |
| Atomic Mass | 63.55 u |
| Electron Configuration | [Ar]4s1 3d10 |
| Oxidation States | +2, +1 |
| Electronegativity | 1.9 (Pauling) |
| Atomic Radius | 140 pm |
| Ionization Energy | 7.726 eV |
| Electron Affinity | 1.228 eV |
| Block | D |
Physical Properties
| Appearance | red-orange metallic luster |
| Standard State | Solid |
| Melting Point | 1357.77 K (1084.6 °C) |
| Boiling Point | 2835 K (2561.8 °C) |
| Density | 8.933 g/cm³ |
| Molar Heat | 24.44 J/(mol·K) |
| CPK Color | #C88033 |
Classification
| Category | Transition Metal |
| Group Block | Transition metal |
| Period | 4 |
| Group | 11 |
| Block | D |
Discovery
| Year Discovered | Ancient |
| Discovered By | Middle East |
| Electron Shells | 2, 8, 18, 1 |