When atoms of hydrogen and carbon form molecules, they tend to arrange themselves into durable structures of rings and long chains in which the atoms bond strongly via shared electrons. (scientificamerican.com)
As simple as an individual water molecule is — two atoms of hydrogen bonded with one of oxygen — it forms weak bonds to its neighbors creating more - complex structures. (sciencemag.org)
They discovered that only the transport of charged atoms of hydrogen (H +) played a role in the regenerative process. (sciencedaily.com)