What is the chemical symbol for aluminum?

The chemical symbol for aluminum is "Al." This symbol is derived from the first two letters of the element's name and follows the conventions of the periodic table, where each element is represented by a one- or two-letter symbol. Aluminum is classified as a post-transition metal and is known for its lightweight, malleability, and resistance to corrosion, making it valuable in various industries such as construction, transportation, and packaging. Other symbols provided in the options represent different elements: for example, "P" stands for phosphorus, "Sn" is for tin, and "Hg" represents mercury, each having distinct properties and uses in chemistry.