H₂O
What we drink
H₂O is the chemical formula for water—two hydrogen atoms bonded to one oxygen atom.
The notation appears in scientific contexts but also in casual speech as a playful or precise way to say water: I need some H₂O after that workout.
The formula emphasizes water's molecular nature rather than its everyday familiarity.
Clear essential liquid
- moleculeBonded atomic group
- hydrogenSimplest atomic element
- oxygenElement eight, colorless gas
- covalent bondShared-electron atomic link
chemical formula · polar · liquid · compound · molecular structure · bonding · electron · valence
Clear essential liquid
- iceWater's solid form
- steamHeated water's gaseous form
- wetSaturated with liquid
- liquidFree-flowing substance
cool · chill · aqua · drip · flow · splash · sip · refreshing
Non-saline aquatic environment
- groundwaterWater in underground rock
- aquiferGroundwater-bearing geological formation
- watershedDrainage area boundary
- water cycleContinuous planetary moisture movement
evaporation · precipitation · conservation · scarcity · pollution · ecosystem · ocean · glacier
Systematic fact-finding effort
- laboratoryFacility for scientific investigation
- experimentSystematic investigation procedure
- analysisMethodical study of parts
- purificationRemoval of contaminants
distillation · deionized · reagent · solution · titration · spectroscopy · sample · sterile
Safe liquid for consumption
- thirstNeed for fluid
- rehydrationReplacing lost water
- electrolytesConducting ions in solution
- hydrateInfuse with water
beverage · moisture · replenish · dehydration · sports drink · wellness · daily intake · health
water
Clear essential liquid
covalent bond · chemical formula · polar · liquid · compound · molecular structure · bonding · electron · valence · dipole
water
Clear essential liquid
liquid · cool · chill · aqua · drip · flow · splash · sip · refreshing · pure
freshwater
Non-saline aquatic environment
- groundwaterWater in underground rock
- aquiferGroundwater-bearing geological formation
- watershedDrainage area boundary
water cycle · evaporation · precipitation · conservation · scarcity · pollution · ecosystem · ocean · glacier · ice cap
research
Systematic fact-finding effort
- laboratoryFacility for scientific investigation
- experimentSystematic investigation procedure
- analysisMethodical study of parts
purification · distillation · deionized · reagent · solution · titration · spectroscopy · sample · sterile · clinical
drinking water
Safe liquid for consumption
- thirstNeed for fluid
- rehydrationReplacing lost water
- electrolytesConducting ions in solution
hydrate · beverage · moisture · replenish · dehydration · sports drink · wellness · daily intake · health · bottle