* Sharing Electrons: Each hydrogen atom has one electron in its outermost shell, while oxygen has six. To achieve a stable configuration, they share electrons. The oxygen atom shares one electron with each hydrogen atom, forming two covalent bonds.
* Polarity: Oxygen is more electronegative than hydrogen, meaning it pulls the shared electrons closer to itself. This creates a partial negative charge on the oxygen atom and partial positive charges on the hydrogen atoms. This makes the water molecule polar, with a positive end and a negative end.
The attraction between the partially positive hydrogen atoms of one water molecule and the partially negative oxygen atom of another water molecule is called a hydrogen bond.
Hydrogen bonds are weaker than covalent bonds, but they are still important because they:
* Hold water molecules together: This gives water its high surface tension and allows it to exist as a liquid at room temperature.
* Allow water to dissolve many substances: The polarity of water molecules helps them to break apart ionic compounds and attract polar molecules.
* Play a crucial role in biological processes: Hydrogen bonds are essential for maintaining the structure of proteins, DNA, and other biological molecules.
