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On Fire Chain Reaction 
Here we look at how the combustion of hydrogen gas can lead to a chain reaction. On the face of it, the chemical reactions that take place in the combustion of hydrogen are relatively simple: The hydrogen molecules combine with oxygen molecules to form water molecules, and energy is released in the process. The equation for this reaction is this... H2 + O2 -> H2O More about this equation This equation doesn't show, however, all of the intermediate reactions that lead to the formation of water. These reactions can be initiated when a hydrogen atom is added to hydrogen and oxygen molecules. Continue...
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