WebElement A substance in its purest form. All the atoms are the same. Molecules Two or more atoms joined together. There atoms may be the same or they may be different. Compound Two or more different atoms joined together a set ratio Atom Smallest particle of matter with a set composition Ion WebChemical Reactions -A chemical reaction is in which the bonds are broken within reactant molecules, and new bonds are formed within product molecules in order to form a new substance. Chemical reactions are all around us. Chemical reactions are continually taking place on our planet. To learn Definition, Equations, Types, Examples with FAQs …
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