ࡱ> wyv%` %bjbjNN .,,%:::::::N*ND2J```````$vh :`````::```.:`:``h::O`> Py֒ /0D?`!`! OOX`!:``````` ```D````NNNR NNNR NNN:::::: Metals, Nonmetals & Metalloids  INCLUDEPICTURE "http://web.buddyproject.org/web017/web017/images/periodic%20table.JPG" \* MERGEFORMATINET  Metals, Nonmetals, & Metalloids Most periodic tables contain a stairstep line which allows you to identify which elements are metals, nonmetals, and metalloids. Following are descriptions of each of the three types of materials. Metals Most elements are metals. 88 elements to the left of the stairstep line are metals or metal like elements. Physical Properties of Metals: Luster (shininess) Good conductors of heat and electricity High density (heavy for their size) High melting point Ductile (most metals can be drawn out into thin wires) Malleable (most metals can be hammered into thin sheets) Chemical Properties of Metals: Easily lose electrons Corrode easily. Corrosion is a gradual wearing away. (Example: silver tarnishing and iron rusting) Nonmetals Nonmetals are found to the right of the stairstep line. Their characteristics are opposite those of metals. Physical Properties of Nonmetals: No luster (dull appearance) Poor conductor of heat and electricity Brittle (breaks easily) Not ductile Not malleable Low density Low melting point Chemical Properties of Nonmetals: Tend to gain electrons Since metals tend to lose electrons and nonmetals tend to gain electrons, metals and nonmetals like to form compounds with each other. These compounds are called ionic compounds. When two or more nonmetals bond with each other, they form a covalent compound. Metalloids Elements on both sides of the zigzag line have properties of both metals and nonmetals. These elements are called metalloids. 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