What makes aluminum a metal and carbon a nonmetal?

Answer 1

Aluminum is classified as a metal due to its properties such as high electrical and thermal conductivity, malleability, ductility, and a shiny appearance. Metals generally have a tendency to lose electrons and form positive ions, which is characteristic of aluminum. In contrast, carbon is considered a nonmetal because it typically does not exhibit metallic properties; it is a poor conductor of electricity and can form covalent bonds rather than metallic bonds. Additionally, carbon exists in various allotropic forms, including graphite and diamond, which further highlight its nonmetallic characteristics.