Which of the following elements is represented by the chemical symbol Al?

The chemical symbol Al represents aluminum, which is a metallic element widely used in various industries due to its lightweight and corrosion-resistant properties. Aluminum is found in abundance in the Earth's crust and is frequently used in the manufacturing of products ranging from packaging and construction materials to aircraft and automotive components. The symbol Al is derived from the element's name, making it straightforward and easily recognizable in the periodic table.

In contrast, the other options represent different elements entirely: mercury, lead, and tin each have their unique symbols (Hg, Pb, and Sn, respectively) and distinct physical and chemical properties that differentiate them from aluminum. Understanding the periodic table and the corresponding symbols helps in identifying elements accurately in a scientific context.