The Octet rule, is a simple chemical rule of thumb. This rule says that atoms mostly combine in a way, so that there are 8 electrons in their valance shells, giving them the same electronic configuration as a noble gas. http://en.wikipedia.org/wiki/Octet_rule
A Bohr diagram is a way of showing atoms on a diagram. It shows how many electrons, protons and neutrons there are.
http://en.wikipedia.org/wiki/Bohr_model
A Lewis dot diagram is a diagram that shows atoms together, and electron pairs in the molecules.
Examples of Bohr diagrams.
Examples of Lewis Dot diagrams.
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