Question
What are the differences between atoms and molecules?
| Atom | Molecule |
| An atom is the smallest particle of an element | A molecule is the smallest particle of an element or compound. |
| Atom does not exist in the free state except in a noble gas | The molecule exists in the free state |
| Except some of the noble gas, other atoms are highly reactive | Molecules are less reactive |
| Atom does not have a chemical bond | Atoms in a molecule are held by chemical bonds |
| Example: Na | Example: $N_2$ |
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