H2O (Water)

Definition

H2O, or water, is a molecule composed of two hydrogen atoms bonded to one oxygen atom. It's essential for all known forms of life and plays a critical role in various biological processes.

Related terms

Hydrogen Bonding: This is the type of bond that holds water molecules together. It's a weak attraction between the slightly positive hydrogen atom on one molecule and the slightly negative oxygen atom on another.

Polarity:

This refers to the uneven distribution of charge within a molecule. In water, oxygen has a slight negative charge while hydrogen has a slight positive charge.

Cohesion:

This is the property that makes water molecules stick together due to hydrogen bonding. It's why droplets form and why some insects can walk on water!