Periodic Table

• • Periodic table lists all of the elements known in order of increasing atomic number - into vertical columns called groups and horizontal rows called periods.
• Arrangement of periodic table:

  • Elements with similar properties appear in the same group.
  • Metals found to left and centre.
  • Non-mental found to right.
  • Metalloids found in between.
• Metals and non-metals

  
• Metals

  Properties:

  • Shiny
  • Good conductors
  • High melting / boiling points
  • Malleable (easy to shape)
  • High density
  • Strong / solid
  • Sonorous (ring like bell)
  • Ductile (can be drawn out in wire)
• Non-metals

  Properties:

  • Dull
  • Poor conductors
  • Low melting / boiling points
  • Low density
  • Brittle
• Metalloids - border of metal and non-metals so can have properties of both.

  • E.G. Silicon - solid, conducts electricity, shiny, low density, brittle.