Small molecules are central players as building blocks, effectors and probes of macromolecular structure ... and probes for magnesium hexahydrate binding sites in RNA, similar chemical mimics ...

The chemical formula for Magnesium Oxide, MgO, tells us that there is one atom of magnesium for every one atom of oxygen. Butane, which has the chemical formula C₄H₁₀, has four carbon atoms ...