Post-transition metals are a group of metallic elements found in the periodic table, specifically in groups 13 to 16. They include elements like aluminum, tin, lead, and bismuth. These metals typically have lower melting and boiling points compared to transition metals and exhibit properties such as malleability and ductility. These elements often have a higher electronegativity and ionization energy than transition metals, making them more reactive with nonmetals. Post-transition metals can form covalent bonds and are commonly used in various applications, including electronics, packaging, and construction materials.