Illustrated Glossary of Organic Chemistry

Molecular structure: A description of a molecule's structure, including (but not limited to) the atoms that compose the compound, covalent and ionic bonds, bond angles, bond lengths, lone pairs, formal charges, partial charges (δ⁺ and δ^-), etc. There are numerous ways to represent molecular structure, including Lewis structures, bond-line structures, ball and spoke models, space filling models, and molecular model kits.

Lewis structure		Ball and spoke		Space filling model		Molecular model kit

A few of many possible ways to represent the molecular structure of water.