Abstract
A molecule is a collection of atoms kept together by interactions among those atoms. For some purposes it is better to consider the molecule as consisting of the nuclei of its constituent atoms and its electron density distribution. Generally, it is the geometry and symmetry of the arrangement of the atomic nuclei that is considered to be the geometry and symmetry of the molecule itself.
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Notes
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Hargittai, M., Hargittai, I. (2009). Molecular Shape and Geometry. In: Symmetry through the Eyes of a Chemist. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5628-4_3
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