http://www.educaplus.org/play-77-Enlace-i%C3%B3nico.html
http://www.educaplus.org/play-78-Naturaleza-del-enlace-químico.html
http://www.educaplus.org/play-87-Reactividad-de-los-metales.html
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/reaction/bonding1.html
http://www.avogadro.co.uk/structure/chemstruc/network/g-molecular.htm
http://www.avogadro.co.uk/structure/chemstruc/ionic/g-ionic.htm
http://www.avogadro.co.uk/structure/chemstruc/molecular/molecular.htm
http://www.avogadro.co.uk/structure/chemstruc/metallic/metallic.htm
http://www.wwnorton.com/college/chemistry/gilbert2/chemtours.asp#8
http://www.visionlearning.com/library/flash_viewer.php?oid=1349
http://www.uwgb.edu/dutchs/PETROLGY/Halite%20Structure.HTM
http://www.uwgb.edu/dutchs/PETROLGY/Diamond%20Structure.HTM
http://www.uwgb.edu/dutchs/PETROLGY/Pyrite%20Structure.HTM
http://www.pdipas.us.es/g/galindo/tabla.htm
http://www.uhu.es/quimiorg/moleculas.html
2 - Sphere Packing - Simple Cubic Packing
3 - Sphere Packing - Body Centered Cubic Packing
4 - Sphere Packing - Cubic Close Packing