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Clear, accurate chemistry definitions
1,500+
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6
topics
118
-element periodic table
Chemistry Dictionary
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O
O
Observable
Occlusion
Octahedral
Octane Number
Octet Rule
Off-Axis Chromatic Aberration
Oganesson
Ohm’s Law
Oil
Open Sextet
Optic Axis
Optical Activity
Optical Isomers
Orbital
Orbital Filling
Ordinary Ray
Ore
Organic
Organic Chemistry
Organic Compound
Osmium
Osmosis
Osmotic Pressure
Ostwald Process
Ostwald Ripening
Outer Orbital Complex
Overlap
Oxidation
Oxidation Number
Oxidation-Reduction Reactions
Oxide
Oxidizing Agent
Oxygen
Oxygen-Free High-Conductivity Copper
Ozonolysis
