Here's why:
* Polarity: Water molecules are polar, meaning they have a slightly positive end (near the hydrogen atoms) and a slightly negative end (near the oxygen atom).
* Electrostatic Attraction: The positive end of one water molecule is attracted to the negative end of another water molecule. This attraction between the slightly positive hydrogen and the slightly negative oxygen is what forms the hydrogen bond.
Hydrogen bonds are weaker than covalent bonds, but they are strong enough to:
* Hold water molecules together: This is why water has a relatively high boiling point and surface tension.
* Influence the properties of many biological molecules: Hydrogen bonds play a crucial role in the structure and function of proteins, DNA, and other important molecules.
