AQA 2023 AS CHEMISTRY QUESTIONS WITH 100% CORRECT ANSWERS

Absolute temperature - ANSWERS Temperature measured in Kelvin Absolute zero - ANSWERS The lowest possible temperature theoretically achieveable - 273.15 degrees celius or zero Kelvin Acceleration - ANSWERS The stage in mass spectrometry where positive ions are speeded up by an electric field Acid rain - ANSWERS Rain that has been acidified by pollutants such as sulfur dioxide Actual yield - ANSWERS Mass of product obtained in a reaction Addition polymer - ANSWERS Polymer formed when many small unsaturated molecules join together Addition reaction - ANSWERS The adding together of two or more more to form one larger molecule Aldehyde - ANSWERS An organic compound containing the -CHO functional group Alkaline earth metal - ANSWERS An element from group 2 of the periodic table Alkane - ANSWERS A saturated hydrocarbon with the general molecular formula CnH2n Allotrope - ANSWERS Allotropes are different forms of the same element that exist in the same physical state. Diamond and graphite are allotropes of carbon Alloy - ANSWERS A mixture of two or more metals or a mixture of metal and a non metal Alpha particle - ANSWERS A particle consisting of two protons and two neutrons ejected from a nucleus Amine - ANSWERS An organic compound that contains nitrogen atom joined to one or more carbon atoms and two or less hydrogen atoms Amount of substance - ANSWERS The number of particles present, symbol n. It is measured in mole, mol Anion - ANSWERS A negatively charged ion attracted to the anode during electrolysis Antacid - ANSWERS A base taken as a medicine to neutralise excess stomach acid Aromatic - ANSWERS Containing one or more benzene rings Atom - ANSWERS The smallest particle of an element that has the properties of that element Atom economy - ANSWERS The proportion of reactants that are converted into useful products rather than waste products Atomic number - ANSWERS The number of protons in the nucleus of an atom, symbol Z Atomic radius - ANSWERS The distance from the centre of the nucleus to the outer electrons of an atom Aufbau principle - ANSWERS The building up process that describes the filling of atomic orbitals in order of increasing energy Avogadro constant - ANSWERS The number of particles in one mole of a substance6.022*10^23 Avogadro's principle - ANSWERS The idea that equal volumes of gases contain the same number of molecules under the same conditions of temperature and pressure Axial atom - ANSWERS Atom positioned at the top or bottom of a trigonal bipyramidal molecule Barometer - ANSWERS An instrument for measuring atmospheric pressure Base peak - ANSWERS The tallest peak in a mass spectrum Batch process - ANSWERS An industrial process that is started and stopped at intervals. Production of ethanol by fermentation is a batch process Bent line - ANSWERS The shape of a molecule that contains two bonding pairs and two lone pairs of electrons Biofuel - ANSWERS A fuel made from the products of living things Bond angle - ANSWERS The angle between two adjacent bonds on the same atom Bond - ANSWERS Attractive force between two atoms, ions or molecules