Living things are made of cells, and cells are made of molecules. Molecules are made of atoms, that are connected through their electrons and protons. This list of links is meant to support your understanding of matter, and then to support your view of the complex macromolecules of life.
Interactive Periodic Table of the Elements
pH: Power of Hydrogen
Water Chemistry
3D molecular images - freeware
Interactive Periodic table that shows the outcome of combing two elements.
A chemistry unit that explains ionic and covalent bonding, with organic chemistry examples. Nicely laid out!