Physical Properties to classify Metals, Nonmetals & Metalloids by.

Malleability  The ability of some metals to be bent or hammered into different shapes.

Ductility  The ability of some metals to be pulled or twisted into wire.  If it is ductile, it is also malleable.

Brittle  Breaks when you try to bend or twist it.

Luster  Shines like the leg of your desk.  Metallic Luster  High Luster = metallic, very shiny  Dull Luster = metallic, not shiny  No Luster = no metallic shine

Conductor  Good Conductor - Allows heat and/or electricity to easily pass through.  Poor Conductor – Allows a little heat and/or electricity to pass through.

Semi-Conductor  Allows some heat/electricity to pass through.

Insulator  Keeps heat and/or electricity from passing through.  Opposite of a conductor.

Metals Non-metals Metalloids

Metals  Located on the left side of the zig-zag line  Solid at room temp. (except for mercury – Hg)  Good conductors of heat & electricity  Shiny  Malleable: Can be hammered into sheets  Ductile: Can be pulled into wire

Nonmetals  Located on the right side of the zig- zag line  Includes gases  Dull, Brittle – if solid  Not malleable and not ductile  Not good conductors (Are good Insulators)

Metalloids  Show characteristics of metals and nonmetals (ex: have a metallic luster but NOT be a good conductor of electricity.)  semiconductors of electricity (conduct electricity more easily than insulators and less easily than conductors)

Metalloids Boron Silicon Germanium Arsenic Antimony Tellurium Polonium Astatine on the zig-zag line