<P> The chemical elements can be broadly divided into metals, metalloids and nonmetals according to their shared physical and chemical properties . All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide . Metalloids are metallic - looking brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides . Typical nonmetals have a dull, coloured or colourless appearance; are brittle when solid; are poor conductors of heat and electricity; and have acidic oxides . Most or some elements in each category share a range of other properties; a few elements have properties that are either anomalous given their category, or otherwise extraordinary . </P> <P> Metals appear lustrous (beneath any patina); form mixtures (alloys) when combined with other metals; tend to lose or share electrons when they react with other substances; and each forms at least one predominantly basic oxide . </P>

What are the properties of metals nonmetals and metalloids
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