Metals, Nonmetals, MetalloidsOnline version matching characteristics & elements to the correct category by Elizabeth Padhi 1 Metals 2 Nonmetals 3 Metalloids Left side of the periodic table Good Conductor Poor Insulator Malleable Luster Ductile Right side of the PT Good insulator Poor conductor Hydrogen Dull Brittle Mostly gases Properties of both metals and nonmetals Found on the staircase Semiconductor Can be lustrous or dull Can be brittle or malleable