Atomic Structure

Atomic Structure

1. How to name compounds

   • NaCl = NaClO3
   • Sodium chloride = Sodium chlorate

2. Working out the formula of a compound using the periodic table

   • Aluminium
     • Group 3
     • Al3+
   • Fluoride
     • Group 7
     • F-
       • F-
         • F-
         • Needs three F- to cancel out one Al3+
           • So formula is AlF3

3. Atoms

   • Development of models of the atom;
   • Names, relative mass and relative charge of subatomic particles;
   • Working out the number of subatomic particles in different atoms;
   • Drawing atoms with electrons in shells (e.g. fluorine);
   • Know that the group number is the number of electrons in the outer shell.

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