Recommended interactive Periodic Tables for researching more information about elements:
http://www.periodictable.com http://www.ptable.com http://ed.ted.com/periodic-videos
Cartoon Periodic Table with explanations: https://elements.wlonk.com/index.htm
6.1. Periodic table. 6.7. Bohr-Rutherford atom.
6.4. Patterns in Periodic Table.