chemistry

chemistry

1. periodic table

   • organisation
     • groups
     • periods
     • transition elements
     • metals + non metals
   • history
     • medeleev
       • pt
     • neils bow
     • democritus
       • atomos
     • marie curie
       • radioactivity
     • jj thomson
       • electrons + plum pudding
     • ernest rutherford
       • golofoil + nucleus

2. atoms

   • mass numbers
   • covalent
     • E - sharing
       • non - metals
   • ions
     • cation (+)
       • lose electrons
         • metal
     • anion (-)
       • gain electrons
         • non-metal
   • E - shells
     • valency
     • 2,8,8,8,8
       • (not bigger than 20)
   • P, N & E
     • nucleus

3. balencing equations

   • writing formula + word equations