# Hydrogen Bond --- A **hydrogen bond** is a weak [[chemical bond]] between molecules when hydrogen (which is slightly positive) is attracted to a slightly positive atom in a different molecule. They are not technically truely "chemical bonds", as no electrons are shared or transfered. They are attractive forces between things that have opposite charges. They do a lot, the vast majority of work in [[biology]]. It provides the structure and function of biology. ## Hydrogen Bonds In Water The eaisest example is in [[water]], where the hydrogen is attracted to the oxygen in the surrounding molecules. Basically, this makes water stick to itself as each molecule is its own magnet. This is *a lot* of what makes water so special. ## Hydrogen Bonds And Proteins These are the primary bonds that make [[protein|proteins]] take their shape. Because amino acids in proteins vary in their charge and polarity, different ones have different properties in terms of their interaction with ions, protons, and water. ___