Aluminum (Al)
Aluminum (Al, element 13) is a post-transition metal in group 13, period 3. Atomic mass 26.982, electron configuration [Ne] 3s² 3p¹, uses and facts.
About Aluminum
Aluminum is a post-transition metal with the symbol Al and atomic number 13. It is a solid at room temperature, and it sits in group 13, period 3 of the periodic table. Aluminum was discovered in 1825 by Hans Christian Ørsted.
Aluminum key facts
- Atomic number: 13
- Symbol: Al
- Atomic mass: 26.982 u
- Category: post-transition metal
- Group: 13
- Period: 3
- State at room temperature: solid
- Electron configuration: [Ne] 3s² 3p¹
- Electronegativity (Pauling): 1.61
- Melting point: 933.47 K (660.32 °C)
- Boiling point: 2792 K (2518.85 °C)
- Density: 2.7 g/cm³
- Common oxidation states: +1, +3
Electron configuration
The electron configuration of aluminum is [Ne] 3s² 3p¹. The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells. Aluminum has 3 valence electrons.
Uses of aluminum
- Aircraft
- Packaging
- Construction
Did you know?
Was once more valuable than gold: the Washington Monument is capped with aluminum.
Other elements in group 13 and neighbours
Frequently asked questions
What is the atomic number of aluminum?
The atomic number of aluminum is 13, which means every aluminum atom has 13 protons.
What is the electron configuration of aluminum?
The electron configuration of aluminum is [Ne] 3s² 3p¹.
What group and period is aluminum in?
Aluminum is a post-transition metal in group 13, period 3.
What state is aluminum at room temperature?
Aluminum is a solid at room temperature.
What is aluminum used for?
Aluminum is used for aircraft, packaging, construction.