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Aluminium (Al)
Element with atomic number 13, category: Post-transition metal, a solid at room temperature.
Element 13 of 118
Post-transition metal
Aluminium
Group 13, Period 3
Common Uses
Cans, aircraft frames
Electron Diagram
About Aluminium
Aluminium is a chemical element with the symbol Al and atomic number 13, meaning every atom has 13 protons in its nucleus. It is classed as Post-transition metal and is a solid at room temperature. Its atomic mass is about 26.982 atomic mass units (u).
On the periodic table, Aluminium sits in group 13, period 3, which determines how many electron shells it has and how it tends to react with other elements.
Uses of Aluminium
In daily life and industry, Aluminium is used for Cans, aircraft frames. These uses are closely tied to the typical properties of elements in the Post-transition metal category.
Electron Structure of Aluminium
Using a simplified electron shell model (at most 2 electrons in the first shell, 8 in the second, 18 in the third, and so on), Aluminium has 3 electron shells, with an approximate arrangement of 2, 8, 3 electrons from the innermost shell to the outermost. This is a simplified learning model, not the full electron configuration that accounts for the s, p, d and f subshells.
Explore Other Elements
Want to see another element or try the element symbol quiz? Go back to the Interactive Periodic Table to explore all 118 chemical elements.