Aluminum is a chemical element with the symbol Al and atomic number 13. It belongs to the group of metals known as post-transition metals and is commonly used for various industrial purposes due to its lightness and resistance to corrosion.
The number representing the total number of protons in an atom's nucleus.
The arrangement of electrons within different orbitals around an atom's nucleus.
A tabular representation of all known elements arranged according to their atomic numbers and recurring chemical properties.