Atomic Structure

Atomic Structure

1. Atoms

   • Elements
     • Made up of atoms with the same atomic number
     • May travel as two atoms called a molcule
   • Compounds
     • Made up of two or more different atoms
     • Can be seperated in many different ways
   • Electronic Structure
     • Elements need a full outer shell to become stable
     • Amount of electrons in outer shell determines reactivity

2. Group Elements

   • Group 1
     • Very reactive with certain substances
     • React with the moisture in the air
   • Group 7
     • Most reactive elements
     • 7 electrons in outer shell
   • Group 0
     • Do not react with anything
     • Known as the noble gasses

3. Speration techniques

   • Electrolysis
     • Seperation of substances using electricity
     • Only used for seperating elements more reactive than carbon
   • Displacement Reactions
     • A more reactive element displaces a less reactive element
     • Sodium Chloride + Magnesium = Magnesium Chloride + sodium
   • Distillation
     • Seperates salt and water to their original forms
     • (you can seperrate them with evapouration but this way you keep the salt)

4. The Periodic Table

   • History
   • Modern