With reference to elements – define the term ‘molecule’. Give two… - Vidyadip

Question

With reference to elements $–$ define the term ‘molecule’. Give two examples each of a monoatomic, diatomic $\&$ polyatomic molecule.

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Answer

Molecule : Atoms of the same element or different elements combine to form a molecule. It is the smallest particle of a substance $-$ which can normally exist independently and can retain, the physical and chemical properties of the substance.
Examples
Monoatomic molecule : Metals $- \ce{Na , Mg}$ etc.
Diatomic molecule : $\ce{H_2, O_2, N_2}$.
Polyatomic molecule : $\ce{O_3, P_4}$.

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