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Vocabulary for IELTS (Academic) - Chemistry

Here you will learn some English words about chemistry, such as "arsenic", "catalyst", "distill", etc. that are needed for the IELTS exam.

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Words for Academic IELTS
arsenic
arsenic
[noun]

a poisonous chemical element with properties of both metals and nonmetals that is grey in color, used in industry or as a pesticide

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calcium
calcium
[noun]

a soft silver-white metal that is an important element in bones and teeth

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carbon
carbon
[noun]

a nonmetal element that can be found in all organic compounds and living things

Ex: Graphite, used in pencils, is another allotrope of carbon. 
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copper
copper
[noun]

a metallic chemical element that has a red-brown color, primarily used as a conductor in wiring

Ex: Copper is valued for its high electrical conductivity, which makes it ideal for wiring in electrical systems. 
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helium
helium
[noun]

a chemical element that is a colorless noble gas which is lighter than air

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gold
gold
[noun]

a valuable yellow-colored metal that is used for making jewelry

Ex: She wore a necklace adorned with a pendant made of gold. 
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iron
iron
[noun]

a metallic chemical element with a silvery-gray appearance, widely used for making tools, steel, buildings, and various industrial products

Ex: Iron is commonly used in construction to make buildings and bridges. 
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lead
lead
[noun]

a heavy soft metal, used in making bullets, in plumbing and roofing, especially in the past

Ex: Historically, lead was commonly used in plumbing systems due to its malleability and corrosion resistance. 
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acid
acid
[noun]

a water-soluble chemical substance that contains Hydrogen and has a sour taste or corrosive feature with a PH less than 7

Ex: The lemon juice contains citric acid, which gives it a sour taste and a pH of around 2. 
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catalyst
catalyst
[noun]

(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself

Ex: Enzymes are naturally occurring biological catalysts that allow complex metabolic reactions to proceed efficiently in living cells. 
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chemical
chemical
[noun]

a substance or compound produced or used in a process involving chemistry

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element
element
[noun]

a substance that is composed of only one type of atom, typically characterized by specific physical and chemical properties

Ex: Oxygen is an essential element for human respiration. 
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compound
compound
[noun]

(chemistry) a substance that its molecules consist of two or more elements that are held together by a chemical bond

Ex: Water is a compound made of hydrogen and oxygen atoms. 
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to hydrate

(chemistry) to combine and form a compound with water molecules

Ex: When calcium chloride is exposed to air, it hydrates by absorbing moisture from the atmosphere. 
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mixture
mixture
[noun]

(chemistry) a combination of two or more substances without forming a chemical bond or any chemical reaction

Ex: Air is a mixture of nitrogen, oxygen, and trace gases. 
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to adsorb
to adsorb
[Verb]

to take in a liquid, gas, or other substance from the surface chemically or physically

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balanced
balanced
[Adjective]

evenly distributed or in a state of stability

Ex: She maintained a balanced diet consisting of fruits, vegetables, and proteins. 
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to behave
to behave
[Verb]

(chemistry) to react in a particular way because of the laws

Ex: The compound behaves differently when exposed to high temperatures, following the laws of thermodynamics. 
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bond
bond
[noun]

a link that holds atoms or ions together in any molecule or crystal

Ex: The covalent bond between the hydrogen and oxygen atoms forms a water molecule. 
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to catalyze

to increase the rate of a chemical reaction

Ex: Enzymes play a crucial role in living organisms as they catalyze biochemical reactions necessary for cellular functions. 
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chain reaction

a chemical or nuclear process that is self-sustained and its products cause other processes of the same kind

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chemical reaction

(chemistry) a process in which several chemicals combine and form different substances

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to dehydrate

(chemistry) to lose water molecules during a chemical reaction

Ex: When heated, copper(II) sulfate pentahydrate undergoes a chemical reaction to dehydrate. 
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to distill

to heat a liquid and turn it into gas then cool it and make it liquid again in order to purify it

Ex: The chemist is currently distilling the solution to isolate the pure compound. 
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equation
equation
[noun]

a symbolic representation of a chemical reaction showing reactants and products

Ex: The teacher wrote the combustion equation on the board. 
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formula
formula
[noun]

a symbolic representation of a chemical substance using its constituent elements

Ex: H₂O is the chemical formula for water. 
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to precipitate

(chemistry) to become separated from the solvent in a solid form

Ex: Upon cooling the saturated sugar solution, crystals began to precipitate at the bottom of the container. 
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preservation

the action of keeping something the way it is or in good condition

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reaction
reaction
[noun]

(chemistry) a process in which several chemicals combine and form different substances

Ex: The reaction between hydrogen and oxygen produces water. 
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aluminum
aluminum
[noun]

a light silver-gray metal used primarily for making cooking equipment and aircraft parts

Ex: The new set of aluminum cookware is both lightweight and highly resistant to corrosion, making it perfect for the kitchen. 
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