The arrangement of small molecules—known as ligands—around transition metal atoms affects how the metal atoms behave. This is important because transition metals are used as catalysts in the synthesis ...

The typical size of atoms and small molecules is around 1 × 10-10 m (0.1 nm). For example: diameter of a hydrogen atom, H 1.0 × 10-10 m width of a hydrogen molecule, H 2 2.9 × 10-10 m ...