http://en.wikipedia.org/wiki/Covalent_bond [2]
http://chemwiki.ucdavis.edu/Theoretical_Chemistry/Chemical_Bonding/Gener... [3]
http://www.chemguide.co.uk/atoms/bonding/covalent.html [4]
http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch8/valenceframe.html [5]
http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/bond.html [6]
http://www.csus.edu/indiv/t/toofanj/JThome/students/chem-110/CHE110-CH11... [7]
http://www.sgh.rcs.k12.tn.us/TEACHERS/walrathb/Web_page/power%20points/4... [8]
http://web.chem.ucsb.edu/~feldwinn/Chem1C/Overheads/chapter-14-slides.pdf [9]
Links
[1] https://hootsgo.org/?q=node/6437
[2] http://en.wikipedia.org/wiki/Covalent_bond
[3] http://chemwiki.ucdavis.edu/Theoretical_Chemistry/Chemical_Bonding/General_Principles/Covalent_Bonds
[4] http://www.chemguide.co.uk/atoms/bonding/covalent.html
[5] http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch8/valenceframe.html
[6] http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/bond.html
[7] http://www.csus.edu/indiv/t/toofanj/JThome/students/chem-110/CHE110-CH11.pdf
[8] http://www.sgh.rcs.k12.tn.us/TEACHERS/walrathb/Web_page/power%20points/4.03CovalentBonding.pdf
[9] http://web.chem.ucsb.edu/~feldwinn/Chem1C/Overheads/chapter-14-slides.pdf