Definition
A nonmetal is an element that typically lacks the characteristic properties of metals, such as luster, high conductivity, and malleability. Nonmetals are generally poor conductors of heat and electricity and can exist in solid, liquid, or gaseous forms at room temperature. Examples include oxygen, nitrogen, sulfur, and carbon. Think of them as the underdogs of the periodic table! Nonmetals are essential for life and play key roles in chemical reactions.