I looked at "Water Concepts" at http://www.edinformatics.com/math_science/water_concepts.htm I actually found it interesting. I think the nice thing about this link is that it takes something very simple - in this case the covalent bonding of hydrogen and oxogen to form water. Water I can see touch and have a understanding of some of it qualities (unlike some other chemical structures). It highlighted some basic concepts with easy graphics and to the point explainations of what was being shown. It made me look around the site a bit more to see if "why does ice float" and "why is carbon monoxide so dangerous" is also explained so well. It is.
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