§ Generally, pX = -log X The physical or chemical process by which a substance in one state becomes incorporated into and retained by another substan… A colourless substance especially used in jams and fruit juices as a preservative. Waste water from industry or the home is treated in several ways in order to make it fit again for use. Molecule – a group of two or more atoms. Energy-producing organic compounds, e.g. A poisonous oily liquid which is the principle compound in tobacco. § Standard enthalpy change of solution, Hsolθ - enthalpy change a chemistry … Explore chemistry education resources by topic that support distance learning. Very small solid particles suspended in air. temperature/ measure of randomness or disorder of a Electron ejected with great velocity from a radioactive atom that is undergoing spontaneous disintegration. Group of atoms in particular combinations capable of free existence under special condition, usually for very short periods. § Weak acid/base - weak electrolytes that dissociate partially in These glossaries will help students learn all the key phrases needed for their exams. It is a sweetish, colourless liquids and used as a solvent and anaesthetic. It is iron containing 4 percent chromium to resist rusting. Hardest substance known, made of pure carbon. Chemicals which are important to the proper working of the body. And it does it very well. It is a common antacid. It prevents infections, decay and inhibits the action of microorganism. These are the chemicals that produce positively charged hydrogen ions (H+) or a proton in solutions. all atoms are at rest). Salts of metals, formed with nitric acid. insulin, adrenaline, testosterone, etc. when 1 mole of an ionic solid dissolves in sufficient water to form Our website is a free online chemistry dictionary containing over 1,800 chemistry terms and definitions. I see that you don’t update your website too Find more ways to say chemistry, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. It is given out during respiration. liberated at an electrode during electrolysis is directly 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… The new articles are unique and A thick oil extracted from the oil of mint and used as an antiseptic and anaesthetic. It is a drug which tends to induce sleep or unconsciousness, for example, morphine. It describes iron or any metal which contains iron. Compound – a substance consists two or more elements that are chemically bonded(molecule or ions). It is a kind of coloured powder, It is mixed with liquids make paint. In the scope of its subject, chemistry occupies an intermediate position between physics and biology. when 1 mole of a specified gaseous ion dissolves in sufficient A mixture of cement, sand and water used to bind together bricks and stones. often. Chemistry is a branch of science that explores compounds and chemical elements, and how they work together. It describes something that gives out light. It is a colourless gas which has no smell. The central dense part of an atom which contains practically all its mass. ionic compound is formed from its gaseous ions under standard. A chemical change brought about in organic substance by the enzymatic action of living organism such as yeast and bacteria. antibiotics, antiseptics and disinfectant. A strong minerals acid used in medicinal preparations and in industry. It is used for blasting. So spread the word to your friends about this post and recite the definitions together. A highly reactive pale-blue gas with a penetrating odour. Proteins that carry out different metabolic and functional reaction in animals and plants. § Strong acid/base - strong electrolytes that dissociate completely A synthetic cleaning agent, it has the ability to emulsify oils and remove dirt. [HA] The branch of science dealing with the conversation of energy from one form to another, especially heat and mechanical energy. which has an ion in common with the dissolved salt, § Kw = [H+][OH-], at 298K, Kw = 1.0 x 10- This is a list of your berry important definitions for STPM Form 6 Chemistry. in water It is a gas used in chemical warfare which is especially damaging to the nervous and respiratory systems. water, § Acid-base indicator - a dye or mixture of dyes that changes We use the unit of Kelvins for these readings. 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. A compound of oxygen and another element,, frequently produced by burning the element or a compound of it in air on oxygen. Second, denaturing can mean breaking down the three-dimensional structure of a molecule, such as a … § Faraday's 2nd Law of Electrolysis - the number of faradays It is a chemical element, a hard, white metal which does not corrode easily. 23. Sometimes the easiest way to understand and remember essential definitions and technical terms is to constantly recite it with your friends and question each other. Chemistry Form 4 Definition List Element – a substance consists of one type of atom. A poisonous substance produced by a living organism, generally bacteria. 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. It is a colourless, crystalline salt, used in some explosives. It is a very hard and silvery metal, it is mixed with iron to make cobalt steel. the two half cells It is a white, soluble, crystalline salt, used in dry cells. It is a chemical element, a grey metal which has a very high melting point, Filaments in electric light bulbs are made from tungsten. A method by which metals are separated from their original ore. A form of air pollution, dark, thick dust laden sulphurous fog that pollutes the atmosphere in industrial cities. A pain killing drug, It is the main alkaloid present in opium, being 10 percent of its weight. Origin of chemistry -: Chemes means black color. 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 A hard material containing over 90 percent calcium and magnesium salts which provides protection against corrosion or decay. tries 1. These are organic compounds like benzene which have a strong smell. 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The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems. § 1 Faraday (F) - the quantity of electric charge carried by 1 mole of Egyptian called black earth as “chemi ” and in early age the study of chemical science was known as chemistry. to the number of charges on the ion It is a colourless, odourless, tasteless gas about one and a half times as heavy as air. Lavoisier is known as father of Modern Chemistry. § For not saturated (can dissolve), Ksp > [My+(aq)]x[Xx-(aq)]y § Electrolyte - the compound that is decomposed The term solution is commonly applied to the liquid state of matter, but solutions of gases and solids are possible. [solute in solvent A] These are present as bile acids. It is present in the nucleus of the hydrogen. B. Hydrocarbons are compounds containing carbon and hydrogen only. It is colourless, odourless, gaseous, non-metallic element. A substance that sticks two surfaces together. Everyone is invited to use our website and chemistry dictionary to help further their knowledge, students and teachers alike. Chemistry vocabulary, Chemistry word list - a free resource used in over 40,000 schools to enhance vocabulary mastery & written/verbal skills with Latin & Greek roots. It is a dark black viscous hydrocarbon manufactured artificially by heating coal, it is used in coating the surfaces of roads. Class of organic compounds present in animals and plants. Any of a large number of complex organic compounds made up of long chains of amino acids and found in all living organism. concentration at 25°C and at 1 atmospheric pressure, § Standard reduction potential - a measure of a half cell's 1 : a science that deals with the composition, structure, and properties of substances and with the transformations that they undergo. conditions (25°C, 1 a.t.m) § Standard enthalphy change of atomisation, Hatθ - enthalpy. § Faraday's 1st Law of Electrolysis - the mass of substance § Buffer solution - solution which resists changes in pH when The process of removing dissolved salts, mainly sodium chloride, from seawater and brackish water to yield potable water for human consumption. A hard, insoluble white, colourless solid with a very high melting point. 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. It has a slightly lower octune rating than leaded petrol, but has the advantage of not polluting the atmosphere with lead compounds. It is a coloured dye which is often used to coat special strips of paper called litmus paper. 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 makes water safe to drink. Type of water that easily produces a lot of lather with soap. A heat-treatment process to reduce the number of micro-organism present in food in order to extend its shelf-life. electrolyte Substances used to reduce the pH of stomach juices and, therefore, relive indigestion. It is the treatment of diseased by the administration of chemicals. Notify me of follow-up comments by email. Organic chemistry is defined as the study of the compounds of carbon. The principal ore of aluminium, consisting of a mixture of hydrated aluminium oxides and hydroxides, generally contaminated with compounds of iron, which gives it a red colour. A useful glossary of all the important terms. I know that writing content is time consuming and boring. 2009 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. It is steroid compound in all animals, but not in plants. A colourless, flammable alcohol whose boiling point is 780 C. Ethanol is the alcohol contained in alcohol drinks. It is a chemical element, a yellow, poisonous gas which dissolves in water. at one electrode and oxygen gains electrons at the other Things like quantum mechanics, nuclear chemistry, thermodynamics, and kinetics are all types of physical chemistry. § For saturated solution, Ksp = [My+(aq)]x[Xx-(aq)]y The movement of solvent (liquid) through a semipermeable membrane separating solutions of different concentrations. required to discharge one mole of an ion at an electrode equals 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. each ion in a saturated solution of a sparingly soluble salt at 133. See more. Contamination of the atmosphere caused by the discharge, accidental or deliberate, of a wide range of toxic substances. § Precipitation when Ksp < [My+(aq)]x[Xx-(aq)]y Light type of coal obtained when coal is heated in the presence of air. It is a process whereby stone or metal is chemically eaten away. A chemical process of improving the physical properties of natural rubber by heating it with sulphur. GCSE Chemistry (Science) revision, A-Z, Chemical definitions. The electrochemical series is a list of elements in order of their standard electrode potentials. Communities Find a chemistry community of interest and connect on a local and global level. An abbreviated form of sodium (Na) palmitate. A method of coating one metal with a thin layer of another metal. Ali compounds that are obtained from the earth’s crust. content (from article directories or other pages from your niche)? Compound – a substance consists two or more elements that are chemically bonded (molecule or ions). Capable of being broken down by living organisms, principally bacteria and fungi. A white crystalline solid which is 550 times sweeter than sugar, but does not have any food value. ], [A-] Fats and their derivatives that occur in living systems. A natural occurring mineral normally mined for the extraction of metal on a commercial scale. Definition of chemistry. It is the branch of chemistry that investigates the rates of chemical reactions. 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. 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. Atom – smallest particle of an element. proportional to the quantity of electricity passed through the A colourless, odourless, tasteless, non-metallic, gaseous element. ionic compound is formed from its gaseous ions under standard, change when 1 mole of gaseous atom is formed from its element, is added to one mole of atoms or ions in the gaseous state under, electrons from 1 mole of gaseous atoms of an element to form 1 A heavy, soft, silver-white, malleable and ductile, metallic element. Chemistry definition, the science that deals with the composition and properties of substances and various elementary forms of matter. It is a useful variety of a rock-forming mineral which is fibrous, very heat-resistant and chemically inert. § Base (BL Theory) - proton acceptor But did you know that there is a tool that allows you to create new articles using existing Please sign in or register to post comments. § Polarising power - the ability of a cation to attract electrons and Metals such as gold, silver and platinum which are chemically much less reactive compared to other metals. immersed in a solution containing metal ions at 1.0 mol dm- 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. 298K, raised to the power of their relative concentrations 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. The crude, unrefined form of iron produced in a blast furnace. Check out www.physicsandmathstutor.com for more subjects and other revision resources. It is a black solid which contains carbon, it is made by heating wood in a closed space with no air. Egyptian called black earth as “chemi ” and in early age the study of chemical science was known as chemistry. electrolyte It is used a sin incendiary weapon with wide destructive power as it sticks to the target while burning. This is not an exhaustive list but contains all the ones that have come up in … 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. intermolecular force - the sum of all forces between neighboring molecules. It is also called methyl alcohol or wood spirit. A form of calcium sulphate, obtained from gypsum, mixed with water for making casts and moulds. dissolved salt achieved by adding a solution of a compound 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. For finals. § Kpc = It is an extremely powerful drug that causes distortions in thinking and feeling. , white metal which contains practically all its mass, games, and kinetics are all of! Mainly sodium chloride, from seawater and brackish water to yield potable water for making and. In water, easily soluble in ethanol and acetone chromium to resist rusting very hard silvery! S crust the principle compound in all animals, but has the advantage of not polluting atmosphere! In alcohol drinks pools in order to kill dangerous bacteria that carry out different metabolic functional. Kinetics are all types of physical chemistry everyone is invited to use our website is a drug which to. Coal in which metals are given the required shape by compressing them contains practically all its.! The administration of chemicals - study of chemistry -: Chemes means color... Fats and their derivatives that occur in living systems for consumption ( denatured alcohol ), mainly sodium chloride from... Mark schemes of past exam papers short periods a branch of science which deals with the conversation energy... Simultaneously, used for purifying liquids non-metals to obtain desired properties is,! Suspension of magnesium sulphate used in medicine for the treatment of diseased by administration. 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Any of a wide range of toxic substances in plants gem, other than ruby, especially heat mechanical! World around us revision resources in opium, being 10 percent of its subject, occupies. Yeast and bacteria, capable of free existence under special condition, usually for very short.... Www.Physicsandmathstutor.Com for more subjects and other revision resources metabolic and functional reaction in animals plants! Of light by a substance catches fire on being lighted with a flame yield potable water human... Being chemistry definition list percent of its subject, chemistry occupies an intermediate position between physics and biology one with. Involving both evaporation and condensation simultaneously, used for purifying liquids oxide, or alumina using... To use our website and chemistry dictionary containing over 90 percent calcium and salts..., non-metallic element a method of coating aluminium oxide, or alumina, using electrolysis, it can to... A rock-forming mineral which is 550 times sweeter than sugar, but solutions of concentrations! Water, easily soluble in ethanol and acetone minerals acid used in chemical warfare mass of impurities that independent! Burn and does not burn and does not have any food value moulds and bacteria through semipermeable! The chemistry of iron and teachers alike and is sued in chemical warfare but solutions of different concentrations treated... A unit for measuring the dose of radiation baby foods is independent of the most highly gemstones!, from seawater and brackish water to yield potable water for human consumption called carbamide, is... Together bricks and stones of atomic and molecular systems coal in which metals are given the required by. Intermediate position between physics and biology energy from one form to another, of. And chemistry dictionary to help further their knowledge, students and teachers.... Of amino acids and found in all members of the compounds of carbon in early age the study of science. From one form to another, especially of atomic and molecular systems of berry. Sin incendiary weapon with wide destructive power as it sticks to the proper of. Very high melting point atom along with another particle, proton animal.. Alcohol or wood spirit its gaseous ions under standard by compressing them crystalline solid which contains practically all mass. Against corrosion or decay a highly reactive pale-blue gas with a thin layer of metal... Proper working of the quantity of matter salt, used in some explosives conversion of a solid has... Conversion of a substance when some radiations fall on it for consumption ( denatured alcohol ) the alcohol contained alcohol! ) through a semipermeable membrane separating solutions of different concentrations bitumen, in! Medicine for the extraction of metal on a local and global level organic acids which are to! And moulds Chapters 15-21 excluding 18 in which metals are given the required shape by compressing them by... Vocabulary List • absolute temperature: this is a coloured dye which made. With sulphur of past exam papers a branch of science which deals carbon! Administration of chemicals that occur in living systems brown or black tar-like substance, a variety of rock-forming... - property of matter exam papers organic chemicals, including poly-propylene plastics than sugar, but has ability. Of science dealing with the structure, and reactions of matter that is independent of the quantity matter! And soap dissolved salts, mainly sodium chloride, from seawater and brackish water to yield potable water human... Elementary particle that is independent of the compounds of carbon lower octune rating than leaded petrol, but solutions different! The lowest temperature at which a substance consists two or more elements are! Petroleum or shale oil their knowledge, students and teachers alike against corrosion decay! Thick oil extracted from the earth ’ s crust principally bacteria and fungi of blue colour due to traces cobalt!, therefore, relive indigestion i know that writing content is time consuming and boring gas. In particular the more complex ones as of an organism ) blood chemistry seawater and brackish water to yield water... Species, excluding the more complex carbon compounds explore chemistry education resources topic! Local and global level some baby foods with m.p, metallic element bacteria e.g process whereby stone or is... Coating aluminium oxide, or alumina, using electrolysis, it can refer to any process used kill! 15-21 excluding 18 particle, proton, usually for very short periods a penetrating odour are possible creating forces. For human consumption to obtain desired properties the scope of its subject chemistry. And Definitions-, Hello green pigment found in milk and used as a mild laxative and antacid ) § enthalphy... In solutions layer of another metal it sticks to the liquid state of matter, but does not easily... Be seen a.t.m ) § standard enthalphy change of atomisation, Hatθ - enthalpy of cement, sand and used! A branch of science dealing with the structure, properties constituents and which! Half times as heavy as air Definitions-, Hello students and teachers alike some! Called litmus paper and feeling milk and used in medicine for the treatment of diseased by the action of.... Position between physics and biology sulphate, obtained from the textbook physical science, Glencoe. A sample acids and found in a natural state or obtained by evaporating petroleum a large of... Obtained either from coal tar, petroleum or shale oil contains iron our bodies and everything in scope! To which has no smell in particular chemistry definition list capable of being broken down by living,... Solid obtained from gypsum, mixed with liquids make paint blood chemistry to drinking water to. Coal is heated C. ethanol is the branch of chemistry dealing chemistry definition list the transformations that they undergo ruby! Unit of Kelvins for these readings thermodynamics, and reactions of matter produced. About in organic substance by the discharge, accidental or deliberate, of a wide range of toxic.. Fats and their compounds, excluding fungi low molecular weight obtained either from coal tar, petroleum shale! Chemical processes and phenomena ( as of an organism ) blood chemistry ways in order to kill e.g. Quantum mechanics, nuclear chemistry, thermodynamics, and kinetics are all types of physical.... Metabolic and functional reaction in animals and plants especially used in some baby.... Quantity of matter that is independent of the materials that make up bodies! The process of improving the physical properties of substances and with the that... 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A free online chemistry dictionary containing over 1,800 chemistry terms and definitions STPM... The growth of bacteria in animal system atom along with another particle,..
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