Element 13
Aluminium
Post-transition metals
Aluminium (Al) is in the p-block of the periodic table — group 13, period 3.
Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13.
Key data
- Atomic number
- 13
- Atomic mass
- 26.982 u
- Group / Period
- 13 / 3
- Block
- p-block
- Phase at STP
- Solid
- Density
- 2.7 g/cm³
- Melting point
- 660.3 °C
- Boiling point
- 2469.8 °C
- Electron configuration
- [Ne] 3s2 3p1
Periodic table block
Aluminium is in the p-block (group 13, period 3). Elements land in the p-block when their highest-energy electrons fill a p subshell — this region holds most nonmetals, the metalloids, and the metals on the right of the table.
New to this? Periodic table blocks explained: s, p, d, and f
Common uses
- •Soda cans
- •Aircraft frames
- •Power lines
Discovery
Year: 1825
Named by: Humphry Davy
Frequently asked questions
What is the atomic number of Aluminium?
Aluminium has atomic number 13. Its symbol is Al and its atomic mass is 26.982 u.
What category of element is Aluminium?
Aluminium is classified as post-transition metals. It sits in group 13, period 3 of the periodic table.
What block of the periodic table is Aluminium in?
Aluminium is in the p-block (group 13, period 3). Its highest-energy electrons occupy the p subshell — you can see this in its electron configuration, [Ne] 3s2 3p1.
What is Aluminium used for?
Common uses of Aluminium include: Soda cans, Aircraft frames, Power lines.
When was Aluminium discovered?
Aluminium was discovered in 1825.
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