Nonmetals are a group of elements that typically lack the characteristics of metals. They are usually poor conductors of heat and electricity and can exist in various states, including gases, liquids, and solids. Common examples of nonmetals include oxygen, nitrogen, and sulfur, which play essential roles in biological and chemical processes. These elements are crucial for life and are found in many compounds. Nonmetals can form covalent bonds with other nonmetals and can also react with metals to form ionic compounds. Their diverse properties make them vital in various applications, from fertilizers to pharmaceuticals.