It is also called methyl alcohol or wood spirit. Ali compounds that are obtained from the earth’s crust. Glass containing lead silicate used for optical purposes. Lavoisier is known as father of Modern Chemistry. Nucleus – In chemistry, the charged center of an atom; contains the atoms protons and neutrons. § Electrode - a rod which conducts electricity to and from the • 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, It is a green pigment found in all members of the plant species, excluding fungi. cane sugar, glucose, starch, etc. It is a drug which tends to induce sleep or unconsciousness, for example, morphine. An abbreviated form of sodium (Na) palmitate. Hydrates of magnesium sulphate used in medicines to empty bowels. Here List of Basic Chemistry Element Terms and Definitions-, Hello. 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. Learn with flashcards, games, and more — for free. Any of a large number of complex organic compounds made up of long chains of amino acids and found in all living organism. It is the treatment of diseased by the administration of chemicals. Water that has had air (oxygen) blown through it. These are present as bile acids. Metals such as gold, silver and platinum which are chemically much less reactive compared to other metals. colour over a specific pH range § Fuel cell - electrochemical cell in which a fuel gives up electrons Organic chemistry is defined as the study of the compounds of carbon. Common name for a suspension of magnesium hydroxide in water. Our website is a free online chemistry dictionary containing over 1,800 chemistry terms and definitions. hydrogen electrode, § Standard cell potential - the difference between the Eθ values of immersed in a solution containing metal ions at 1.0 mol dm- 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. all atoms are at rest). Salts of metals, formed with nitric acid. It is a process of coating aluminium oxide, or alumina, using electrolysis, it makes the surface more resistance to corrosion. Chemistry is a branch of science that explores compounds and chemical elements, and how they work together. § In weak acid, Ka = It is a substance used to kill bacteria e.g. The green germ variety of beryl ,One of the most highly prized gemstones. 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. dissolved salt achieved by adding a solution of a compound A compound of oxygen and another element,, frequently produced by burning the element or a compound of it in air on oxygen. 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. § Polarising power - the ability of a cation to attract electrons and § Standard enthalpy change of solution, Hsolθ - enthalpy change A white, waxy, crystalline solid obtained from the oil of pepper mints and used in medicine and perfumery. when an electric current passes through an electrolyte A colourless, odourless, tasteless, non-metallic, gaseous element. I see that you don’t update your website too It describes iron or any metal which contains iron. It is used for blasting. It is a colourless, crystalline salt, used in some explosives. water, § Acid-base indicator - a dye or mixture of dyes that changes § Precipitation when Ksp < [My+(aq)]x[Xx-(aq)]y [solute in solvent A] 1 : a science that deals with the composition, structure, and properties of substances and with the transformations that they undergo. A chemical process of improving the physical properties of natural rubber by heating it with sulphur. A useful glossary of all the important terms. It is a coloured dye which is often used to coat special strips of paper called litmus paper. Hydrocarbons are compounds containing carbon and hydrogen only. Compound – a substance consists two or more elements that are chemically bonded(molecule or ions). Any gem, other than ruby, especially of blue colour due to traces of cobalt present in it. A colourless substance especially used in jams and fruit juices as a preservative. It is a substance which does not burn and does not change when it is heated. This is not an exhaustive list but contains all the ones that have come up in … A synthetic cleaning agent, it has the ability to emulsify oils and remove dirt. when 1 mole of a specified gaseous ion dissolves in sufficient It is a sweetish, colourless liquids and used as a solvent and anaesthetic. First, it can refer to any process used to make ethanol unfit for consumption (denatured alcohol). Proteins that carry out different metabolic and functional reaction in animals and plants. It contains sodium or ammonium nitrate sensitized with nitroglycerine and use absorbers like wood pulp. Energy-producing organic compounds, e.g. at one electrode and oxygen gains electrons at the other It is a useful variety of a rock-forming mineral which is fibrous, very heat-resistant and chemically inert. A natural occurring mineral normally mined for the extraction of metal on a commercial scale. 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Second, denaturing can mean breaking down the three-dimensional structure of a molecule, such as a … an infinitely (very dilute) solution, § Standard enthalpy change of hydration, Hhydθ - enthalpy change It is a unit for measuring the dose of radiation. insoluble - unable to dissolve in a solvent. It is a white, soluble, crystalline salt, used in dry cells. The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems. It is a chemical element and is a colourless gas which does not dissolve in water. State of a solid that has been heated until it melts. It is steroid compound in all animals, but not in plants. each ion in a saturated solution of a sparingly soluble salt at A list of definitions for AS AQA Chemistry, lifted directly from the mark schemes of past exam papers. Emission of light by a substance when some radiations fall on it. 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. The addition of chlorine to drinking water and to water used in swimming pools in order to kill dangerous bacteria. 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. The physical or chemical process by which a substance in one state becomes incorporated into and retained by another substan… An apparatus that rotates containers at high speeds, creating centrifugal forces. 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 … 2 a : the composition and chemical properties of a substance the chemistry of iron. 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