Chemistry C3 AQA GCSE


  • Created by: Sally Day
  • Created on: 16-04-12 18:36

Early and Modern Periodic Table

Dalton: order of mass
Newlands: 'law of octaves'; assumed all elements found- shoved them in anywhere and ignored patterns
Mendeleev: order of atomic mass- pattern imerged; left gaps for undiscovered

- organised in atomic number (proton number)
larger atoms lose electons more easily and gain them less easily.
   - Group 1- reactivity increases going down the group- more shielding :)
   - Group 7- reactivity decreases going down the group- more shielding :(

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