Chemical reactions involved in making new combinations graphic.
Rights: The University of Waikato Te Whare Wānanga o Waikato Published 30 May 2008 Size: 140 KB Referencing Hub media

Each coloured square represents a simple particle in a chemical reaction – two squares together represent a more complex particle.

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    Chemical reactions and catalysts

    A chemical reaction involves a chemical change, which happens when two or more particles (which can be molecules, atoms or ions) interact. For example, when iron and oxygen react, they change to ...

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