Linked from
The 79 pages that link to Water, each with the reason it gives.
Chemical formulaBroader topic: H₂O illustrates how a molecular formula gives exact atom counts.
SolventBroader topic: It is the most familiar solvent and dissolves many ionic and polar substances.
Lone pairBroader topic: Two oxygen lone pairs help make water bent and polar.
MoleculeBroader topic: Its bent shape and polarity make it a defining example of molecular behavior.