Why is sulfur a non metal?

Sulfur is classified as a nonmetal because it has properties typical of nonmetals, such as being a poor conductor of electricity and heat, and it typically forms covalent bonds rather than metallic bonds. It has a relatively high electronegativity and ionization energy, and it easily gains electrons to form anions. Additionally, sulfur exists in various allotropes, primarily as a yellow crystalline solid, which is characteristic of nonmetals. Its chemical behavior and physical properties align with those of other nonmetals in the Periodic Table.