Metals are usually… A silver-gray color Solid at room temperature Reflect light when polished (lusterous) Can be easily shaped (malleable)

Can be drawn into wires (ductile) Generally have high melting points Are good conductors of heat and electricity

Potassium (K) Silvery white Solid Melting point = o C Good conductor of electricity Highly reactive in water Used in glass and soap

Non-Metals Not metals They can be ANY color Exist as solids, liquids, or gases at room temperature Dull -do not reflect light well When solid they are brittle, Can not be easily shaped. Generally have low melting points Are poor conductors of heat and electricity

Chlorine (Cl) Green Gas Melting point = o C Poor conductor of electricity Used in water purification

Metalloids Solids at room temperature Can be shiny or dull Can be ductile and malleable or can be brittle Conduct heat and electricity better than nonmetals but not as well as metals

Arsenic Metallic Grey solid Melting point = 817 °C Used as a semi-conductor Poisonous

Metal, Nonmetal or Metalloid