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| style=text-align:center|A [[periodic table]] extract highlighting nonmetals
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{{Sidebar periodic table}}
▲{{Sidebar periodic table}}{{Cite check|date=August 2024|reason=Checking of one section indicated that many were incorrect, so everything has to be checked.}}
In the context of the periodic table a '''nonmetal''' is a [[chemical element]] that mostly lacks distinctive [[metal]]lic properties. They range from colorless gases like [[hydrogen]] to shiny crystals like [[iodine]]. Physically, they are usually lighter (less dense) than elements that form metals and are often poor conductors of [[Thermal conduction|heat]] and [[Electrical conductor|electricity]]. Chemically, nonmetals have relatively high [[electronegativity]] or usually attract electrons in a chemical bond with another element, and their oxides tend to be [[acidic]].
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