THREE TYPES OF ELEMENTS Metals nonmetals and metalloids

THREE TYPES OF ELEMENTS Metals, nonmetals, and metalloids Only nonmetal on the metal side Hydrogen are to the left of the stairstep are to the right of the stairstep , or semimetals, touch the stair-step

Properties of Metals �Good conductors of heat and electricity. �Shiny luster (light reflects off the surface). �Ductile (can be stretched into thin wires). �Malleable (can be pressed into thin sheets). �Many will corrode (react with air or water and change color �Solid at room temperature except Hg (Mercury). �Most metals are on the LEFT of the periodic table.

Properties of Non-Metals �Poor Bromine is the only non-metal that is liquid at room temperature. conductors of heat and electricity. �Solid non-metals are brittle and break easily—they are NOT ductile or malleable. �Dull luster (light does not reflect off the surface). �Many non-metals are gases. �Non-metals are found in the upper RIGHT side of the periodic table.

Properties of Metalloids �Metalloids (metal-like) have properties of both metals and nonmetals. �They are solids that can have a shiny or dull luster. �They conduct heat and electricity better than nonmetals but worse than metals. �They are ductile and malleable. �Along the stair step-- “Boron the Moron” is at the top of the

Uses of Metals �Copper— electrical wire �Gold—jewelry �Sodium— medicine and agriculture

Uses of Nonmetals �Oxygen— supports life �Chlorine—water purification �Helium— balloons

Uses of Metalloids �Boron—heat resistant metal alloys �Silicon— making glass and computer parts �Arsenic— poison