The Chemistry Lexicon
Decode any chemistry term. Understand the language of molecules through etymology, examples, and expert insights.
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Browse Terms
Commonly Confused Pairs
The chemistry terms students mix up the most, explained clearly.
Confused Pair
Molarity vs Molality
Molarity is moles of solute per litre of solution. Molality is moles of solute per kilogram of solvent.
Confused Pair
Heat vs Temperature
Heat is energy in transit between bodies at different temperatures. Temperature is the average kinetic energy of the particles in a body.
Confused Pair
Strong Acid vs Concentrated Acid
Strong means the acid ionises completely in water. Concentrated means there is a large amount of acid relative to the water.
Confused Pair
Molecule vs Compound
A molecule is any two or more atoms bonded together. A compound is a molecule made of different elements.
Confused Pair
Oxidation vs Reduction
Oxidation is loss of electrons. Reduction is gain of electrons.
Confused Pair
Exothermic vs Endothermic
Exothermic releases heat to the surroundings. Endothermic absorbs heat from the surroundings.
Confused Pair
Covalent vs Ionic Bond
A covalent bond is sharing of electrons between atoms. An ionic bond is transfer of electrons followed by electrostatic attraction.
Confused Pair
Evaporation vs Boiling
Evaporation happens at the surface at any temperature. Boiling happens throughout the liquid at a specific temperature.
Confused Pair
Atom vs Ion
An atom is electrically neutral. An ion is an atom that has gained or lost electrons and carries a charge.
Confused Pair
Element vs Compound
An element contains only one type of atom. A compound contains two or more different elements chemically bonded in a fixed ratio.
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A curated reference for chemistry terminology, written by [Your Name], [Your Credentials].