Metals- • Lustrous (shiny)
• Good conductors of heat and electricity.
• High melting point.
• High density (heavy for their size)
• Malleable (can be hammered)
• Ductile (can be drawn into wires)
• Usually solid at room temperature (an exception is mercury)
• Opaque as a thin sheet (can't see through metals)
Non-metal- • High ionization energies.
• High electronegativities.
• Poor thermal conductors.
• Poor electrical conductors.
• Brittle solids—not malleable or ductile.
• Little or no metallic luster.
• Gain electrons easily.
• Dull, not metallic-shiny, although they may be colorful.
Metalloid-Are generally solids
- Can be shiny or dull (luster)
- May or may not be drawn into wire (ductile)
- May or may not be hammered flat (malleable)
- May or may not be brittle
- Conduct heat and electricity better than nonmetals, but not as well as metals Tend to make good semiconductors
- Have boiling points that are widely varied
- Have melting points that are widely varied
- Have densities that are widely varied