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CEFR C2 Vocabulary - Chemistry

Here you will learn all the essential words for talking about Chemistry, collected specifically for level C2 learners.

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CEFR C2 Vocabulary
entropy
[noun]
a thermodynamic measure of the degree of disorder or randomness in a system, denoted by S
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solute
[noun]
a substance that is dissolved in a solvent, resulting in a solution
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reactant
[noun]
a substance that takes part in and undergoes a chemical reaction, leading to the formation of new products
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catalyst
[noun]
(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself
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catalysis
[noun]
the acceleration or facilitation of a chemical reaction by a substance (catalyst) that remains unchanged at the end of the reaction
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covalent bond
[noun]
a chemical bond where atoms share electrons to form a stable molecule
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isomer
[noun]
any of two or more compounds having the same molecular formula but different arrangements of atoms and, consequently, different properties
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polymer
[noun]
a large molecule composed of repeating structural units, or monomers, covalently bonded together in a chain-like structure
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monomer
[noun]
a molecule that can chemically bond with other molecules to form a polymer
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hydrocarbon
[noun]
a compound composed of hydrogen and carbon atoms, with the simplest form being alkanes, alkenes, or alkynes
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ester
[noun]
a chemical compound derived from the reaction between an alcohol and an organic acid, typically with the elimination of water
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aldehyde
[noun]
an organic compound with a carbonyl group (C=O) bonded to a hydrogen atom and another carbon atom, commonly found in essential oils and used in various chemical processes
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alcohol
[noun]
a compound with a hydroxyl group (-OH) attached to a carbon atom, widely used as solvents, fuels, and in pharmaceutical and chemical synthesis
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ketone
[noun]
an organic compound with a carbonyl group (C=O) bonded to two carbon atoms, commonly found in solvents, pharmaceuticals, and flavorings
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oxidation-reduction
[noun]
a chemical reaction where electrons are transferred between substances
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molarity
[noun]
the concentration of a solute in a solution, measured in moles per liter (mol/L or M)
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electrolyte
[noun]
a substance that, when dissolved in a solution, produces ions and enables the conduction of electric current
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colloid
[noun]
a mixture where small particles of one substance are evenly dispersed in another substance, typically intermediate in size between solution and suspension particles
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corrosion
[noun]
the gradual destruction of materials by chemical reaction, usually of metals
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alkali
[noun]
any substance with a pH of more than seven that neutralizes acids creating salt and water
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ammonia
[noun]
a gas with a strong smell that dissolves in water to give a strongly alkaline solution
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alloy
[noun]
a combination of two or more metals, creating a metal that is usually stronger or more resistant
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halogen
[noun]
a type of chemical element found in Group 17 of the periodic table, known for being highly reactive and commonly used in disinfectants and lights
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isotope
[noun]
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, leading to variation in atomic mass
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noble gas
[noun]
any of the elements in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon, characterized by their inert nature and stable electron configurations
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emulsion
[noun]
a mixture of two liquids where tiny droplets of one are evenly dispersed in the other, like oil in water
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half-life
[noun]
the time required for half of a quantity of a substance to undergo a change or decay, typically in the context of radioactive decay or chemical reactions
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depleted uranium
[noun]
a type of uranium that has most of its more radioactive isotopes removed, primarily used for armor-piercing ammunition and shielding
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solvent
[noun]
a liquid that is capable of dissolving another substance
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charged
[adjective]
having an electric charge
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