2 METALS Most elements are metals 88 elements to the left of the stairstep line are metals or metal-like elements.
3 Physical Properties of Metals Luster ( shiny )Good conductors of heat and electricityHigh density (heavy for their size)High melting pointsDuctile (most metals can be drawn out into thin wires)Malleable (most metals can be hammered into thin sheets)
4 Chemical Properties of Metals Easily lose electronsCorrode easily. Corrosion is a breaking down or wearing away.Example: silver tarnishes; iron rusts
5 NONMETALS Non-metals are found to the right of the stairstep line. Their characteristics are opposite those of metals
6 Physical Properties of Nonmetals No luster (dull appearance)Poor conductor of heat and electricityBrittle (breaks easily)NOT ductileNOT malleableLow densityLow melting point sulfur
7 Chemical Properties of Nonmetals Tend to gain electronsSince metals tend to lose electrons and nonmetals tend to gain electrons, metals and nonmetals like to form compounds with each otherThese compounds are called ionic compoundsWhen two or more nonmetals bond with each other, they form a covalent compound
8 METALLOIDSElements on both sides of the stairstep line have properties of both metals and nonmetalsThese elements are called metalloids
9 Physical Properties of Metalloids SolidsCan be shiny or dullDuctileMalleableConduct heat and electricity better than nonmetals but not as well as metalsExample: Silicon