Compounds and Molecules

A chemical compound is a bound combination of atoms in the ratio of small whole numbers. Compounds are represented by molecular formuli which indicate the numerical ratios of combination.

H2O
Water
CH4
Methane
NH3
Ammonia

Atoms are held together by chemical bonds. Visualizing the kinds of compounds which can form is aided by Lewis symbols and diagrams.

Inorganic CompoundsOrganic CompoundsBiochemical Compounds
Chemistry of the Elements
Index

Periodic Table

Chemistry concepts
 
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Inorganic Compounds

AcidsBasesSalts
Index

Periodic Table

Chemistry concepts
 
HyperPhysicsR Nave
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