Hydrogen is an element; it exists naturally as a molecule. Each hydrogen molecule is made up of two hydrogen atoms. In hydrogen cars hydrogen reacts with oxygen in a fuel cell, making electricity ...

as it allows for the precise arrangement of molecules into desired structures. Examples of molecular recognition include hydrogen bonding, pi-pi stacking, and ligand-receptor interactions.

The ball-and-stick and first space-filling model show that sucrose is a large molecule made up of carbon, oxygen, and hydrogen. Sucrose has many O–H bonds which are polar. These polar areas are shown ...