Question
What is difference between molecules and compounds? Give examples of each.

Answer

Molecules may be made up of same kind of atoms in case of element, e.g. $\mathrm{O}_2, \mathrm{~N}_2$
Molecule of compound is made up of two or more kind of atoms e.g. $\mathrm{H}_2 \mathrm{O}, \mathrm{CO}_2, \mathrm{NH}_3$

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