Extra Periodic Trends Explanation

If anyone needs help understanding periodic trends, I have found a few websites that help to explain how atoms are characterized on the periodic table.

http://chemwiki.ucdavis.edu/Core/Inorganic_Chemistry/Descriptive_Chemistry/Periodic_Trends_of_Elemental_Properties/Periodic_Trends

https://www.chem.tamu.edu/class/majors/tutorialnotefiles/trends.htm

http://www.sciencegeek.net/Chemistry/taters/Unit2PeriodicTrends.htm