Chemistry - What is a reaction?
What is a reaction?
Click to view the video showing the reaction between magnesium and oxygen.
What makes a "reaction"?
If a new substance has been formed you have observed a reaction. While, as
shown in the video, light and heat are often liberated during a reaction
this is not always true. The important thing is that, with our knowledge of
the periodic table, we can predict what will occur during a reaction and
then observe this taking place with a good understanding of what we are
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