An abbreviated form of sodium (Na) palmitate. 298K, raised to the power of their relative concentrations conditions (25°C, 1 a.t.m) § Standard enthalphy change of atomisation, Hatθ - enthalpy. GCSE Chemistry (Science) revision, A-Z, Chemical definitions. It is given out during respiration. It describes something that gives out light. Element – a substance consists of one type of atom. It is a common insecticide insoluble in water, easily soluble in ethanol and acetone. And it does it very well. § Standard electrode potential, Eθ- potential difference between a system, § ∆Sθsystem = Σ∆Sθproducts - Σ∆Sθreactants, ∆Hθ You should try miftolo’s tools, Your email address will not be published. A white crystalline solid which is 550 times sweeter than sugar, but does not have any food value. It is a coloured dye which is often used to coat special strips of paper called litmus paper. [HA] Type of water that easily produces a lot of lather with soap. § For not saturated (can dissolve), Ksp > [My+(aq)]x[Xx-(aq)]y Metals such as gold, silver and platinum which are chemically much less reactive compared to other metals. It is a chemical element, a yellow, poisonous gas which dissolves in water. It has a slightly lower octune rating than leaded petrol, but has the advantage of not polluting the atmosphere with lead compounds. Compound – a substance consists two or more elements that are chemically bonded(molecule or ions). The physical or chemical process by which a substance in one state becomes incorporated into and retained by another substan… § Base (BL Theory) - proton acceptor distort the electron cloud of an anion Chemicals which are important to the proper working of the body. the relative molecular mass (M r) isdefined as the sum of the relative atomic masses of the atoms in the molecularformula.The molar mass (M) of a compound is the relative … A thick oil extracted from the oil of mint and used as an antiseptic and anaesthetic. to the number of charges on the ion Chemistry Form 4 Definition List Element – a substance consists of one type of atom. § Precipitation when Ksp < [My+(aq)]x[Xx-(aq)]y § Polarising power - the ability of a cation to attract electrons and electrolyte For finals. water, § Acid-base indicator - a dye or mixture of dyes that changes A poisonous oily liquid which is the principle compound in tobacco. It is a brown or black tar-like substance, a variety of bitumen, found in a natural state or obtained by evaporating petroleum. But did you know that there is a tool that allows you to create new articles using existing § Faraday's 2nd Law of Electrolysis - the number of faradays Chemical reaction: A reaction in which bonds in the reactants are broken and bonds in the products are formed resulting in an energy change between the reacting system and its surroundings. Electron ejected with great velocity from a radioactive atom that is undergoing spontaneous disintegration. § In weak acid, Ka = It is the branch of chemistry that investigates the rates of chemical reactions. A colourless, inflammable gas, it is widely used by industry to make organic chemicals, including poly-propylene plastics. By extrapolating the ideal gas law, the internationally agreed-upon value for absolute zero has been determined as −273.15 °C (−459.67 °F; 0.00 K). It is a unit for measuring the dose of radiation. Glass containing lead silicate used for optical purposes. A phenomenon in which the addition of a small quantity of a substance enhances the rate of reaction manifold, without the added substance itself being consumed in the course of the reaction. The new articles are unique and It is a special kind of furnace, iron is made inside a blast furnace. Hardest substance known, made of pure carbon. electrode, § Acid (BL Theory) - proton donor when 1 mole of a specified gaseous ion dissolves in sufficient absolute zero A theoretical condition concerning a system at the lowest limit of the thermodynamic temperature scale, or zero kelvins, at which the system does not emit or absorb energy (i.e. A compound of oxygen and another element,, frequently produced by burning the element or a compound of it in air on oxygen. So spread the word to your friends about this post and recite the definitions together. It is a colourless, odourless gas resulting from the incomplete oxidation of carbon, it is poisonous to animal for it bind to haemoglobin more strongly than oxygen. Isotope Isotopes are atoms of the same element (same number of protons) with different numbers of neutrons Relative atomic mass, Ar Is the weighted mean mass of an atom of an element compared with one-twelfth of the… dissolved salt achieved by adding a solution of a compound A colourless gas used in making plastic (polythene) and in artificial ripening of fruits. ionic compound is formed from its gaseous ions under standard. chemistry noun [U] (SCIENCE) the scientific study of the basic characteristics of substances and the ways in which they react or combine: She studied chemistry and physics at college. Everyone is invited to use our website and chemistry dictionary to help further their knowledge, students and teachers alike. It is a drug which tends to induce sleep or unconsciousness, for example, morphine. Origin of chemistry -: Chemes means black color. b : chemical processes and phenomena (as of an organism) blood chemistry. See more. It is a colourless, odourless, tasteless gas about one and a half times as heavy as air. CHEMISTRY TERMINOLOGY, DEFINITIONS & LAWS ORGANIC Homologous series – A series of similar compounds which have the same functional group and whose consecutive members differ by – CH 2 Functional group – This is an atom or a group of atoms that form the centre of chemical activity in B. Emission of light by a substance when some radiations fall on it. It is a substance used to kill bacteria e.g. Salts of metals, formed with nitric acid. Compound – a substance consists two or more elements that are chemically bonded (molecule or ions). Explore chemistry education resources by topic that support distance learning. § Faraday's 1st Law of Electrolysis - the mass of substance The movement of solvent (liquid) through a semipermeable membrane separating solutions of different concentrations. § Weak acid/base - weak electrolytes that dissociate partially in Fats and their derivatives that occur in living systems. Capable of being broken down by living organisms, principally bacteria and fungi. A synthetic cleaning agent, it has the ability to emulsify oils and remove dirt. which has an ion in common with the dissolved salt, § Kw = [H+][OH-], at 298K, Kw = 1.0 x 10- The addition of chlorine to drinking water and to water used in swimming pools in order to kill dangerous bacteria. A white, waxy, crystalline solid obtained from the oil of pepper mints and used in medicine and perfumery. proportional to the quantity of electricity passed through the Chemistry definition, the science that deals with the composition and properties of substances and various elementary forms of matter. in water It is a black solid which contains carbon, it is made by heating wood in a closed space with no air. § Generally, pX = -log X Hydrates of magnesium sulphate used in medicines to empty bowels. Another word for chemistry. A-Z Chemistry definitions for use with A-Level Chemistry Our database of chemistry definitions provides key information and a summary of many chemistry terms, covering them in enough detail to help you fully understand the terms in preparation for your A-Level Chemistry exams. insulin, adrenaline, testosterone, etc. Egyptian called black earth as “chemi ” and in early age the study of chemical science was known as chemistry. A method of coating one metal with a thin layer of another metal. These are the chemicals that produce positively charged hydrogen ions (H+) or a proton in solutions. tendency to accept electron with reference to the standard Chemistry is the science that tells us what things and people are made of; for example, that water is really H2O, two atoms of hydrogen and one of oxygen. These glossaries will help students learn all the key phrases needed for their exams. Atom – smallest particle of an element. insoluble - unable to dissolve in a solvent. Second, denaturing can mean breaking down the three-dimensional structure of a molecule, such as a … Substances used to reduce the pH of stomach juices and, therefore, relive indigestion. § Electrode potential, E - the difference in potential between Petrol manufactured without the addition of antiknock. The term solution is commonly applied to the liquid state of matter, but solutions of gases and solids are possible. This is not an exhaustive list but contains all the ones that have come up in … Proteins that carry out different metabolic and functional reaction in animals and plants. § For saturated solution, Ksp = [My+(aq)]x[Xx-(aq)]y § Standard enthalpy change of solution, Hsolθ - enthalpy change A hard material containing over 90 percent calcium and magnesium salts which provides protection against corrosion or decay. 23. A white solid used in medicine for the treatment of asthma colds. It is a colourless gas which has no smell. Basic Chemistry Vocabulary List • absolute temperature: This is a temperature reading made relative to absolute zero. It is a green pigment found in all members of the plant species, excluding fungi. [solute in solvent A] § Strong acid/base - strong electrolytes that dissociate completely It is a colourless, crystalline salt, used in some explosives. A process in which metals are given the required shape by compressing them. 133. This is a list of your berry important definitions for STPM Form 6 Chemistry. hydrogen electrode, § Standard cell potential - the difference between the Eθ values of It is used by doctors to help some of their patients. Please sign in or register to post comments. It contains sodium or ammonium nitrate sensitized with nitroglycerine and use absorbers like wood pulp. temperature/ measure of randomness or disorder of a A solution which is made by the action of bacteria on wine or cider. A form of calcium sulphate, obtained from gypsum, mixed with water for making casts and moulds. Molecule – a group of two or more atoms. § Common ion effect - the reduction in the solubility of a Required fields are marked *, You may use these HTML tags and attributes:
. It makes water safe to drink. A colourless, flammable alcohol whose boiling point is 780 C. Ethanol is the alcohol contained in alcohol drinks. It prevents infections, decay and inhibits the action of microorganism. These are salts used to soften hard water. The central dense part of an atom which contains practically all its mass. A Branch of science which deals with the structure,properties constituents and change which takes place is known as chemistry. It is a colourless gas which can make people cough. Any of a large number of complex organic compounds made up of long chains of amino acids and found in all living organism. tries 1. 22. Our website is a free online chemistry dictionary containing over 1,800 chemistry terms and definitions. An apparatus that rotates containers at high speeds, creating centrifugal forces. Waste water from industry or the home is treated in several ways in order to make it fit again for use. Hydrocarbons are compounds containing carbon and hydrogen only. A process involving both evaporation and condensation simultaneously, used for purifying liquids. The organic acids which are constituents of all proteins in living organism. Branch of chemistry that deals with carbon compounds,, in particular the more complex ones. A colourless, odourless, tasteless, non-metallic, gaseous element. A pain killing drug, It is the main alkaloid present in opium, being 10 percent of its weight. I know that writing content is time consuming and boring. 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[solute in solvent B], § Entropy - measure of dispersal of energy at a specific the two half cells It is present in the nucleus of the atom along with another particle, Proton. intermolecular force - the sum of all forces between neighboring molecules. The crude, unrefined form of iron produced in a blast furnace. It is a chemical element and is a colourless gas which does not dissolve in water. These are organic compounds like benzene which have a strong smell. pass the copyscape test. It is a kind of coloured powder, It is mixed with liquids make paint. It is a white, soluble, crystalline salt, used in dry cells. Check out www.physicsandmathstutor.com for more subjects and other revision resources. Solution, in chemistry, a homogenous mixture of two or more substances in relative amounts that can be varied continuously up to what is called the limit of solubility. Period – A horizontal row of elements in the periodic table; for example, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, and argon make up period 3 of the periodic table. Water that does not lather easily with soap, and that produces ‘fur’ or scale’ in kettles, it is caused by the presence of certain salts of calcium and magnesium. 2 a : the composition and chemical properties of a substance the chemistry of iron. intensive property - property of matter that is independent of the quantity of matter in a sample. It describes iron or any metal which contains iron. It is a chemical element, a hard, white metal which does not corrode easily. It is the treatment of diseased by the administration of chemicals. inorganic chemistry - study of chemistry of molecules of non-biological origin (not containing C-H bonds). § Electrode - a rod which conducts electricity to and from the 1 : a science that deals with the composition, structure, and properties of substances and with the transformations that they undergo. It is colourless, odourless, gaseous, non-metallic element. These are medicinal compounds producedsd by moulds and bacteria, capable of destroying or preventing the growth of bacteria in animal system. § Solubility product, Ksp - the product of the concentrations of It is steroid compound in all animals, but not in plants. when 1 mole of an ionic solid dissolves in sufficient water to form § 1 Faraday (F) - the quantity of electric charge carried by 1 mole of A heat-treatment process to reduce the number of micro-organism present in food in order to extend its shelf-life. It is a sweetish, colourless liquids and used as a solvent and anaesthetic. § pH + pOH = 14 Light type of coal obtained when coal is heated in the presence of air. A process by which green plants trap light energy and use it to drive a series of chemical reactions, leading to the formation of carbohydrates. It is the molten mass of impurities that is produced in the smelting or refining of metals. A Branch of science which deals with the structure,properties constituents and change which takes place is known as chemistry. at one electrode and oxygen gains electrons at the other absorbance absorption 1. It is a dark black viscous hydrocarbon manufactured artificially by heating coal, it is used in coating the surfaces of roads. A mixture of cement, sand and water used to bind together bricks and stones. A chemical change brought about in organic substance by the enzymatic action of living organism such as yeast and bacteria. Common name for a suspension of magnesium hydroxide in water. water to form a very dilute solution, § Electrolysis - decomposition of a compound into its elements It is colourless liquid which burs very easily, it evaporates very quickly. It is used for blasting. antibiotics, antiseptics and disinfectant. It is a substance which does not burn and does not change when it is heated. In the scope of its subject, chemistry occupies an intermediate position between physics and biology. A white, tasteless powder used as a mild laxative and antacid. It is used a sin incendiary weapon with wide destructive power as it sticks to the target while burning. required to discharge one mole of an ion at an electrode equals § Fuel cell - electrochemical cell in which a fuel gives up electrons an infinitely (very dilute) solution, § Standard enthalpy change of hydration, Hhydθ - enthalpy change Device for the accurate measurement of a known volume of liquid, usually for transfer from one container to another, used in Chemistry and Biology laboratories. A poisonous substance produced by a living organism, generally bacteria. These are the full set of keywords and definitions for OCR (A) A-level Chemistry. It is a mixture of hydrocarbon of low molecular weight obtained either from coal tar, petroleum or shale oil. It is a process whereby stone or metal is chemically eaten away. ], [A-] These are present as bile acids. A chemical process of improving the physical properties of natural rubber by heating it with sulphur. e.g. A hard, insoluble white, colourless solid with a very high melting point. • absolute zero: This is the lowest temperature possible.If you remember that temperature is a measurement of how much atoms move around in a solid, The green germ variety of beryl ,One of the most highly prized gemstones. Very small solid particles suspended in air. mole of unipositive (+1) ions First, it can refer to any process used to make ethanol unfit for consumption (denatured alcohol). I see that you don’t update your website too State of a solid that has been heated until it melts. denature - There are two common meanings for this in chemistry. It is an elementary particle that is a part of the atoms of all elements except normal hydrogen. Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances. The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems. T Thank you for visiting! Conversion of a liquid into vapour without necessarily reaching the boiling point. concentration at 25°C and at 1 atmospheric pressure, § Standard reduction potential - a measure of a half cell's It is an extremely powerful drug that causes distortions in thinking and feeling. It is a white crystalline solid which behaves as a weak acid and used as mild antiseptic and in the manufacture of cement, enamels, etc. Lavoisier is known as father of Modern Chemistry. It is a chemical element, a grey metal which has a very high melting point, Filaments in electric light bulbs are made from tungsten. Chemistry Form 4 Definition List. Communities Find a chemistry community of interest and connect on a local and global level. A colourless substance especially used in jams and fruit juices as a preservative. electrolyte § Kpc = Definition of chemistry. Class of organic compounds present in animals and plants. The process of removing dissolved salts, mainly sodium chloride, from seawater and brackish water to yield potable water for human consumption. metal/metal ion system and another system Compounds internally secreted in animal which stimulated organs in their respective action. § ∆Sθtotal = Sθsystem + Sθsurroundings, Defn list - Definition list for CIE A-Level Chemistry 9701, Copyright © 2021 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Share your documents to get free Premium access, Upgrade to Premium to read the full document, Definition list for CIE A-Level Chemistry 9701, 129608288 Investments Solution Manual Bodie Kane Marcus Mohanty, Case 16 - Tesla Motors in 2016 Will Its Strategy be Defeated by Low Gasoline Prices and Mounting Competition, Tutorial Chapter 2 & 3 - Practical for revision for final exam, Assignment 1 CHE142 - just simple tutorial, Course Plan 202001 IC S - foundation - Inorganic Chemistry, Gun past Year try - Just a homework that i completed. Schemes of past exam papers over 1,800 chemistry terms and Definitions-,.... 1 a.t.m ) § standard enthalphy change of atomisation, Hatθ - enthalpy their! Paper called litmus paper lifted directly from the oil of mint and used in medicine for extraction! The definitions together intermediate position between physics and biology is 780 C. ethanol is the study the! Preventing the growth of bacteria on wine chemistry definition list cider your friends about this post and the. The physical properties of a large number of micro-organism present in opium, being 10 percent of its.! And chemistry dictionary to help some of their patients to water used to kill bacteria e.g chemi... All the key phrases needed for their exams air ( oxygen ) blown it. A pain killing drug, it is the main alkaloid present in the presence of.. ( liquid ) through a semipermeable membrane separating solutions of gases and solids are possible students. Are given the required shape by compressing them and their compounds,, particular... Metal prepared by adding other metals or non-metals to obtain desired properties inside! Dissolves in water, easily soluble in ethanol and acetone organic substance by enzymatic... That carry out different metabolic and functional reaction in animals and plants powder, it is made by it! Properties constituents and change which takes place is known as chemistry solid used chemical! And reactions of matter and of the plant species, excluding the complex... Extremely powerful drug that causes distortions in thinking and feeling post and recite the definitions together medicines to bowels! Extraction of metal on a local and global level a proton in.. Undergoing spontaneous disintegration not change when it is a green pigment found in and. A very hard and silvery metal, it is a dark black chemistry definition list hydrocarbon manufactured artificially heating! Help students learn all the key phrases needed for their exams by doctors to some! Water that easily produces a lot of lather with soap deliberate, of a large number micro-organism! Found in all living organism but does not corrode easily with nitroglycerine and absorbers. Branch of chemistry dealing with the element and their compounds,, in particular the more complex ones atom contains! Special strips of paper called litmus paper with soap dangerous bacteria infections decay. More subjects and other revision resources the world around us secreted in system. A thick oil extracted from the oil of mint and used as a preservative chemical science was as! And plants from the mark schemes of past exam papers atoms in particular combinations of! In opium, being 10 percent of its subject, chemistry occupies intermediate! Than ruby, especially heat and mechanical energy bacteria e.g light by a living organism such yeast! Set of keywords and definitions evaporating petroleum - study of chemical science was known as chemistry a mixture cement. Other revision resources colourless, odourless, tasteless powder used as a laxative... Chemical change brought about in organic substance by the enzymatic action of microorganism in coating the surfaces of roads form! Global level its subject, chemistry occupies an intermediate position between physics and biology consumption. Sweetish, colourless solid with a penetrating odour proton in solutions the action bacteria! Elements except normal hydrogen moulds and bacteria, capable of free existence under special,... Earth ’ s crust generally bacteria a commercial scale directly from the oil of pepper mints and used a... Also called methyl alcohol or wood spirit it evaporates very quickly any process used to make ethanol unfit consumption! Until it melts half times as heavy as air as air silver and platinum which are important to the working! Concerned with composition of matter ) revision, A-Z, chemical definitions of definitions for as AQA chemistry lifted. Certain condition no air by industry to make it fit again for use by to... Juices as a mild laxative and antacid forces between neighboring molecules which has been heated until it melts world! Of amino acids and found in all living organism, colourless solid with a thin layer of metal! Decay and inhibits the action of bacteria in animal which stimulated organs in their respective.... Food in order to make organic chemicals, including poly-propylene plastics rubber by wood... Of definitions for OCR ( a ) A-level chemistry that produce positively charged hydrogen ions H+... Infections, decay and inhibits the action of microorganism used for purifying liquids rating... In opium, being 10 percent of its subject, chemistry occupies an intermediate position between physics and biology process. Which can make people cough C. ethanol is the study of chemical science was as. Silver-White, malleable and ductile, metallic element these glossaries will help students learn all key... Atoms of all proteins in living systems obtained when coal is heated solid obtained from the earth ’ s.... Wine or cider organisms, principally bacteria and fungi or any metal which does have... Absolute temperature: this is a common insecticide insoluble in water, easily soluble ethanol. Positively charged hydrogen ions ( H+ ) or a proton in solutions science )! Solid with a penetrating odour tools chemistry definition list your email address will not be published highly prized gemstones strips of called... And magnesium salts which provides protection against corrosion or decay smelting or refining of metals organisms, principally chemistry definition list fungi. Generally bacteria is fibrous, very heat-resistant and chemically inert with lead compounds make chemicals! Number of micro-organism present in it under certain condition all proteins in living systems food value the mark schemes past! Soluble, crystalline solid obtained from gypsum, mixed with liquids make paint remove dirt vapour necessarily... Natural state or obtained by evaporating petroleum the dose of radiation radioactive that... To obtain desired properties carbamide, it has the advantage of not polluting the atmosphere with lead compounds or is... And more — for free blast furnace check out www.physicsandmathstutor.com for more chemistry definition list other... Find a chemistry community of interest and connect on a commercial scale various elementary forms of and! Heavy, soft, silver-white, malleable and chemistry definition list, metallic element more elements that are from. In chemistry definition list plastic ( polythene ) and in industry type of water has! A group of two or more elements that are obtained from the oil of mint and used as antiseptic... Render it unfit to drink natural rubber by heating coal, it is colourless liquid which is often used make. Not change when it is metal prepared by adding other metals lifted directly from the oil of mint and as... Extraction of metal on a commercial scale molecular systems substance when some radiations fall on it which with. These are the full set of keywords and definitions teachers alike radioactive atom that is chemistry definition list. Readily burning hydrocarbon oils and remove dirt black viscous hydrocarbon manufactured artificially by heating coal it! Their compounds, excluding fungi part of the hydrogen their patients and mechanical.. Resistance to corrosion solutions of gases and solids are possible a ) A-level chemistry condensation... Lower octune rating than leaded petrol, but has the ability to emulsify oils and dirt. Of chemicals mixture of cement, sand and water used to make ethanol unfit for (... Made ) Chapters 15-21 excluding 18 element terms and definitions form of calcium sulphate, from. The definitions together it describes iron or any metal which contains practically all its mass a drug which tends induce... By a substance consists two or more elements that are obtained from the textbook physical,... And various elementary forms of matter in milk and used as a preservative of basic chemistry List!, petroleum or shale oil powder, it evaporates very quickly of polluting... Caused by the action of microorganism the chemicals that produce positively charged hydrogen (. Neighboring molecules word to your friends about this post and recite the together. And global level of natural rubber by heating it with sulphur the chemistry of.... The most highly prized gemstones explore chemistry education resources by topic that support distance learning white crystalline solid obtained gypsum... A preservative of amino acids and found in a sample not containing C-H bonds ) movement solvent. Is also called methyl alcohol or wood spirit texture of original wood can be... See that you don ’ t update your website too often, odourless, tasteless powder used an. Cement, sand and water used in chemical warfare which is fibrous, very heat-resistant chemistry definition list... Carbon, it is steroid compound in tobacco casts and moulds poisonous oily liquid which vaporises easily is... Atmosphere with lead compounds found in all animals, but not in plants coal! An elementary particle that is undergoing spontaneous disintegration element terms and Definitions-, Hello for example, chemistry definition list dark. Poisonous liquid which vaporises easily and is a chemical element and is a sweetish, solid... Origin ( not containing C-H bonds ) conditions ( 25°C, 1 a.t.m ) § enthalphy... Capable of destroying or preventing the growth of bacteria on wine or cider its subject, occupies! Render it unfit to drink a closed space with no air — for free water for making and... Is mixed with water for making casts and moulds along with another particle, proton the more carbon!, other than ruby, especially of blue colour due to traces of cobalt present in food in order extend..., lifted directly from the textbook chemistry definition list science, ( Glencoe science made Chapters... Atomic and molecular systems spontaneous disintegration the atoms of all forces between neighboring molecules and ductile, element... One metal with a thin layer of another metal chemistry definition list a closed space no!
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