13Al26.981538
Aluminum
Post-Transition Metal
Solid at STP
Period 3Group 13Block PDiscovered Ancient
[Ne]3s2 3p1
Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth's crust.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 13 |
| Atomic Mass | 26.981538 u |
| Electron Configuration | [Ne]3s2 3p1 |
| Oxidation States | +3 |
| Electronegativity | 1.61 (Pauling) |
| Atomic Radius | 184 pm |
| Ionization Energy | 5.986 eV |
| Electron Affinity | 0.441 eV |
| Block | P |
Physical Properties
| Appearance | silvery gray metallic |
| Standard State | Solid |
| Melting Point | 933.437 K (660.3 °C) |
| Boiling Point | 2792 K (2518.8 °C) |
| Density | 2.7 g/cm³ |
| Molar Heat | 24.2 J/(mol·K) |
| CPK Color | #BFA6A6 |
Classification
| Category | Post-Transition Metal |
| Group Block | Post-transition metal |
| Period | 3 |
| Group | 13 |
| Block | P |
Discovery
| Year Discovered | Ancient |
| Named By | Humphry Davy |
| Electron Shells | 2, 8, 3 |