cane sugar, glucose, starch, etc. It is a common antacid. For finals. It is present in the nucleus of the hydrogen. ionic compound is formed from its gaseous ions under standard. A colourless, odourless, tasteless, non-metallic, gaseous element. Nucleus – In chemistry, the charged center of an atom; contains the atoms protons and neutrons. Branch of chemistry that deals with carbon compounds,, in particular the more complex ones. 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. Definition of chemistry. insulin, adrenaline, testosterone, etc. Compound – a substance consists two or more elements that are chemically bonded (molecule or ions). 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. 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. tendency to accept electron with reference to the standard A hard, insoluble white, colourless solid with a very high melting point. Substances used to reduce the pH of stomach juices and, therefore, relive indigestion. [solute in solvent B], § Entropy - measure of dispersal of energy at a specific standard hydrogen electrode and a metal (the electrode) which is It is a special kind of furnace, iron is made inside a blast furnace. A heat-treatment process to reduce the number of micro-organism present in food in order to extend its shelf-life. Common name for a suspension of magnesium hydroxide in water. Petrol manufactured without the addition of antiknock. tries 1. It is a green pigment found in all members of the plant species, excluding fungi. Element – a substance consists of one type of atom. We use the unit of Kelvins for these readings. b : chemical processes and phenomena (as of an organism) blood chemistry. Please sign in or register to post comments. § For not saturated (can dissolve), Ksp > [My+(aq)]x[Xx-(aq)]y when an electric current passes through an electrolyte The organic acids which are constituents of all proteins in living organism. § Fuel cell - electrochemical cell in which a fuel gives up electrons It is a process whereby stone or metal is chemically eaten away. B. Atom – smallest particle of an element. These are salts used to soften hard water. 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. It makes water safe to drink. From the textbook Physical Science, (Glencoe Science made) Chapters 15-21 excluding 18. 133. § Solubility product, Ksp - the product of the concentrations of • 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, [!!][!! 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. Glass containing lead silicate used for optical purposes. It is used by doctors to help some of their patients. § In weak acid, Ka = It is a useful variety of a rock-forming mineral which is fibrous, very heat-resistant and chemically inert. Energy-producing organic compounds, e.g. Any gem, other than ruby, especially of blue colour due to traces of cobalt present in it. It is colourless liquid which burs very easily, it evaporates very quickly. Base, in chemistry, any substance that in water solution is slippery to the touch, tastes bitter, changes the color of indicators (e.g., turns red litmus paper blue), reacts with acids to form salts, and promotes certain chemical reactions (base catalysis). A white solid used in medicine for the treatment of asthma colds. Hydrates of magnesium sulphate used in medicines to empty bowels. § Standard enthalpy change of solution, Hsolθ - enthalpy change It is a substance which does not burn and does not change when it is heated. It is a white, soluble, crystalline salt, used in dry cells. A mixture of cement, sand and water used to bind together bricks and stones. Very small solid particles suspended in 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 branch of chemistry dealing with the element and their compounds, excluding the more complex carbon compounds. It is a colourless gas which has no smell. They tend to be complex organic molecules which must be eaten, as in daily products are (Vitamin A) or fruit (Vitamin C). A soft, brownish-black coal in which the texture of original wood can still be seen. Type of water that easily produces a lot of lather with soap. Compound – a substance consists two or more elements that are chemically bonded(molecule or ions). the two half cells It is given out during respiration. GCSE Chemistry (Science) revision, A-Z, Chemical definitions. It describes iron or any metal which contains iron. 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… It is used for blasting. It is a kind of coloured powder, It is mixed with liquids make paint. It is an extremely powerful drug that causes distortions in thinking and feeling. electrolyte 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. Compounds internally secreted in animal which stimulated organs in their respective action. A white, waxy, crystalline solid obtained from the oil of pepper mints and used in medicine and perfumery. A Branch of science which deals with the structure,properties constituents and change which takes place is known as chemistry. pass the copyscape test. at one electrode and oxygen gains electrons at the other An apparatus that rotates containers at high speeds, creating centrifugal forces. Water that has had air (oxygen) blown through it. 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. an infinitely (very dilute) solution, § Standard enthalpy change of hydration, Hhydθ - enthalpy change 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. Our website is a free online chemistry dictionary containing over 1,800 chemistry terms and definitions. It describes something that gives out light. It is a gel made up of some readily burning hydrocarbon oils and soap. Explore chemistry education resources by topic that support distance learning. It is a colourless gas which can make people cough. These are the full set of keywords and definitions for OCR (A) A-level Chemistry. It is also called methyl alcohol or wood spirit. Conversion of a liquid into vapour without necessarily reaching the boiling point. It is a common insecticide insoluble in water, easily soluble in ethanol and acetone. It is a substance used to kill bacteria e.g. Hardest substance known, made of pure carbon. It contains sodium or ammonium nitrate sensitized with nitroglycerine and use absorbers like wood pulp. It is a sweetish, colourless liquids and used as a solvent and anaesthetic. 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. Required fields are marked *, You may use these HTML tags and attributes:
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