Atoms are the fundamental building blocks of all matter. This is the basis of chemistry. But if they are the bricks, then what is the mortar? What holds the atoms together to form molecules? The answer is "bonds" which, of course, doesn't really...

In chemistry, a molecular orbital is a region in which an electron may be found in a molecule.[1] MOs are introduced in qualitative and pictorial models of bonding in molecules, and specify the spatial distribution and energy of one (or a pair) of...