Periodicity

A. Periodic Table

  1. Comprehensive Periodic Table http://ptable.com/
  2. Evolution of Mendeleev's periodic table https://www.youtube.com/watch?v=O-48znAg7VE


B. Periodic Trend

  1. Halogen Displacement Reaction Animation http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel_pre_2011/patterns/groupsrev5.shtml
  2. Ionic radius Animation http://ibchem.com/IB16/05.22.htm#a4