Question
Differentiate the terms atoms, molecules, and ions.
| Atom | Molecules | lons |
| An atom is the smallest particle of an element that can take part in a reaction. It is the basic unit of matter. Examples: $O, H, CI$ | A molecule is the smallest particle of a substance that retains the characteristics of the substance. Examples: $O _2, H _2, Cl _2$ | An ion is any atom or a group of atoms that has a resultant charge due to loss or gain of electrons. Examples: $O ^{2-}, H ^{1+}, Cl ^{1-}$ |
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