So in some cases, one atom is so much more electronegative than a second atom because and so it pulls that electron density completely to one side, and that develops a full positive charge on this, a full positive charge on this, a full negative charge on that. And so we have a separation of two of these full charges, and that will create a force we call Dionic force, or Dionic bond. So three types of intramolecular bonds that hold the atoms in a given molecule together. Now in biochemistry. The chemical bonds we have to really be familiar with are the intermolecular bonds. Because even though the intermolecular bonds aren't as strong as the intramolecular bonds are on a one to one basis because usually we have so many of these intermolecular bonds involved in any given reaction these intermolecular bonds end up playing a very important role in actually determining what the pathway of a reaction is and what the structure of a final molecule is.