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 ...

Heavy water is a form of water with a unique atomic structure and properties ... molecule of heavy water contains two hydrogen atoms and one oxygen atom. The difference, though, lies in the ...