The Periodic Table

The Periodic Table

1. Group O - The Noble Gases

   • Non Metals
   • Stable electron structure - full outer shell
   • All colourless gases
   • Low boiling points
   • very unreactive

2. Group 1 - Alkali Metals

   • One electron in outer shell
   • Soft metals - can be cut with a knife
   • Very reactive
     • Stored in oil to stop reactions with oxygen
   • low melting point
     • increase as go down the group
   • low density
   • thermal and electrical conductor
   • shiny when polished

3. Group 7 - The Halogens

   • main are top four
     • fluorine, chlorine, bromine, iodine
       • non metals
   • toxic
   • low melting and boiling points
   • seven electrons in outer shell
   • reactive

4. GROUP NUMBER = NUMBER OF ELECTRONS IN OUTER SHELL

5. Transition Metals

   • between groups 2 and 3
   • thermal and electrical conductor
   • shiny when polished
   • high melting point
   • high density
   • unreactive