Using electron patterns to predict reaction outcomes
The number and arrangement of an atom's outer electrons, and where an element sits on the periodic table, determine how readily it reacts and what kind of new substances it forms when it does. Chemists use these patterns to predict the outcome of a combustion reaction with oxygen: burning a substance that contains both carbon and hydrogen, like a typical fuel, produces carbon dioxide and water, while burning pure carbon, like graphite, produces only carbon dioxide.
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