Strength of the Hydrogen bond. One of the atoms is hydrogen while the other may be any electronegative atom such as oxygen chlorine or fluorine. Biological Significance Of Hydrogen Bonds In Water Hydrogen Bond Biochemistry Bond Such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces. . One atom of the pair the donor generally a. Hydrogen is the chemical element with the symbol H and atomic number 1. The three other pairs of electrons on the chlorine atom are called. ETFS Hydrogen ETF ASX Code. In basic terms a polymer is a long-chain molecule that is composed of a large number of repeating units of identical structure. Observe how changing the sign and magnitude of the charges and the distance between them affects the electrostatic force. A hydrogen bond is an attraction between two atoms that already participate in other chemical bonds. Therefore the molecule has o...