Hydrogen chloride is the polar diatomic molecule . Its bond has unequal electron sharing because chlorine attracts electron density more strongly than hydrogen.
The gas and an aqueous solution are different descriptions: dissolved hydrogen chloride transfers protons strongly to water and is called hydrochloric acid. Its rotational-vibrational spectrum also provides a simple molecular probe of bond length, force constant, and isotopic mass effects.
New to topics? Read the docs here!