Chemistry

Chemical substances, atomic structure, reactions, laboratory methods, and materials.

70 words

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Some words in this topic are A2–C2 — part of Pro. A1 words are always free.

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A2 (5) Pro

/səˈl(j)uːʃən/ A way of solving a problem or dealing with a difficult situation. M S

/sɔlt/ A white substance used to add flavour to food and to preserve it. M S

/ˈpɹɑ.dəkt/ Something that is made or grown to be sold. M S

/ˈkɛm.ɪ.kəl/ A substance, such as an element or compound, used in or produced by chemistry. M S

/ˈætəm/ The smallest part of a chemical element that can exist. M S

B1 (25) Pro

/æːn/ A common hard grey metal that rusts and is used to make steel M S

/ˈæl.kə.hɔl/ Drinks such as beer, wine, and spirits that can make you drunk. M S

/ɹiˈækʃən/ The way you behave or feel because of something that has happened. M S

/ˈɑk.sɪ.d͡ʒən/ A colourless, odourless gas that humans and animals need to breathe and that makes up part of the air. M S

/ˈɛləmənt/ One of the parts that together make up a whole. M S

/ˈkɛm.ɪ.stɹi/ The science that studies what substances are made of and how they change. M S

/ˈkɑmpaʊnd/ a substance made by combining two or more elements or ingredients M S

/ˈlæb(ə)ɹəˌtɔɹi/ A room or building equipped for scientific research, experiments, or analysis. M S

/ɔɹˈɡænɪk/ Grown or produced without artificial chemicals, fertilizers, or pesticides. M S

concentration B1

/ˌkɑn.sənˈtɹeɪ.ʃən/ the ability to give all your attention to something M S

/əˈtɑː.mɪk/ Relating to atoms, the tiny units that make up all matter. M S

/ˈkɛmɪst/ A scientist who studies or works with chemistry. M S

/məˈlɛk.jə.ləɹ/ relating to or produced by or consisting of molecules M S

/ˈsoʊ.di.əm/ Employing sodium. M S

/daɪˈɑksaɪd/ A chemical compound that has two oxygen atoms in each molecule. M S

/ˈnaɪ.tɹə.d͡ʒən/ The chemical element with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas. M S

/dɪˈzɑlv/ To mix into a liquid and become part of it. M S

/ɹɪˈdak.ʃən/ The act of making something smaller or less. M S

/ˈkæl.si.əm/ the chemical element with symbol Ca and atomic number 20, a soft, silvery, reactive alkaline-earth metal that occurs naturally only in compounds M S

/ˈnuː.kli.əs/ The central part of an atom, made of protons and neutrons. M S

/ɪˈlɛk.tɹɑn/ A tiny particle inside an atom that carries a negative electric charge. M S

/ˈmɑ.lɪ.kjul/ The smallest unit of a substance that still has all its chemical properties, made of two or more atoms joined together. M S

/ˈɑksaɪd/ a chemical compound of oxygen with another element M S

/ˈklɔːr.aɪd/ the negatively charged chlorine ion, Cl−, found in many salts and serving as an important electrolyte in body fluids M S

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B2 (15) Pro

/ˈæsəd/ A chemical substance, often sour or corrosive, that reacts with bases and can dissolve metals. M S

/ˈkɑpəɹ/ A soft reddish-brown metal (symbol Cu) used in wires, pipes, and coins. M S

/ˈkɑɹ.bən/ A chemical element (symbol C) found in all living things, and in forms such as graphite and diamond. M S

/ˈpɹoʊ.tiːn/ A nutrient found in foods such as meat, eggs, and beans that the body needs to grow and stay healthy. M S

/pəˈtæs.i.əm/ the chemical element with symbol K and atomic number 19, a soft, silvery, highly reactive alkali metal that occurs naturally only in compounds M S

/ˈaɪ.ɑn/ an atom or group of atoms with a positive or negative electrical charge because it has lost or gained electrons M S

/ˈsʊl.fə/ A bright yellow chemical element (symbol S) with a strong smell, used in matches, gunpowder, and many industrial products. M S

/ˈnu.tɹɑn/ an elementary particle with 0 charge and mass about equal to a proton M S

/ˈkæt.ə.lɪst/ Something or someone that causes an important change or event to happen. M S

/ˈɛn.zaɪm/ a protein or RNA molecule that catalyzes a biochemical reaction without being consumed by it M S

/ˌmæɡˈnizi.əm/ the chemical element with atomic number 12, a light, silvery-white metal that burns with an intense white flame M S

/ˈpɹoʊ.tɑn/ A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark. M S

/ˈsɔlvənt/ A liquid that can dissolve other substances. M S

/ˈbiː.kɚ/ a straight-sided, flat-bottomed laboratory container, usually with a pouring lip M S

/ɪˌvæpəˈreɪʃən/ the process by which a liquid changes into a gas, especially at its surface M S

C1 (9) Pro

/ˈkɹɪstəl/ A clear, solid mineral form with a regular geometric shape; high-quality clear glass. M S

/ˈhaɪdɹəd͡ʒ(ə)n/ The lightest chemical element (symbol H), a colorless, odorless, highly flammable gas. M S

/flask/ A small flat bottle for carrying a drink, often kept in a pocket. M S

/ˈklɔːr.iːn/ the chemical element with atomic number 17, a toxic greenish-yellow halogen gas in its elemental form M S

/ˌsætʃəˈreɪʃən/ the state or process of being completely soaked, filled, or supplied to capacity M S

/əˈsɪ.dɪk/ Containing acid, or having a pH lower than 7. M S

/ˈsɑljəbəl/ susceptible of solution or of being solved or explained M S

/ɪnˈsɑljəbəl/ without hope of solution M S

/ˈpɑləmɚ/ a large molecule made of many repeating smaller units linked together, or a material consisting of such molecules M S

C2 (12) Pro

/kəmˈbʌs.t͡ʃən/ The process of burning, in which a substance reacts with oxygen to produce heat and light. M S

/ˈnaɪ.treɪt/ a salt or ester of nitric acid, containing the nitrate ion or nitrate group M S

/ˌiːkwəˈlɪbriːəm/ A state of balance in which opposing forces or influences cancel each other out. M S

/ˈaɪ.sə.toʊp/ one of two or more atoms with the same atomic number but with different numbers of neutrons M S

/ˈsʌlfeɪt/ Any salt or ester of sulfuric acid. M S

/ˈæl.kə.laɪn/ relating to or containing an alkali M S

distillation C2

/ˌdɪstɪˈleɪʃən/ The process of purifying a liquid by boiling it and condensing the vapor. M S

/riˈeɪ.dʒənt/ a substance or mixture used to cause, detect, measure, or investigate a chemical reaction M S

electrolysis C2

/ˌɛˌlɛkˈtrɑːləsɪs/ The chemical change produced by passing an electric current through a conducting solution or a molten salt. M S

crystallization C2

/ˌkɹ̠ɪstəlaɪˈzeɪʃən/ The process of becoming clear, definite, or precise. M S

/paɪˈpet/ a narrow graduated tube used to measure or transfer a small quantity of liquid M S

chromatography C2

/kɹoʊməˈtɑɡɹəfi/ a method of separating the components of a mixture by their different movement through a stationary material as a fluid passes over or through it M S

C2+ (4) Pro

/kəˈɹoʊʒən/ The gradual destruction or undermining of something. M S

precipitate C2+

/prɪˈsɪpɪteɪt/ to cause to happen suddenly; hasty; a solid separated from a solution M S

precipitation C2+

/prɪˌsɪpɪˈteɪʃən/ rain, snow, or other water falling from the sky; hasty action M S

/ˈælkəˌlaɪ/ a soluble base that neutralizes acids, turning litmus blue M S

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