Atoms, Bonds and Groups 1.1 3.5 / 5 based on 3 ratings ? ChemistryBonding & shapesASOCR Created by: Nina SkinnerCreated on: 29-03-13 11:11 atoms of the same element with different numbers of neutrons Isotopes 1 of 35 the number of protons in the nucleus of an atom atomic number 2 of 35 the number of particles (protons and neutrons) in the nucleus mass number 3 of 35 a positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion) ion 4 of 35 the mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12 relative isotopic mass 5 of 35 the weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12 realtive atomic mass 6 of 35 the weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of carbon-12 relative molecular mass 7 of 35 the weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12 relative formula mass 8 of 35 the quantity whose unit is the mole. Chemists use it as a means of counting atoms. Amount of substance 9 of 35 the number of atoms per mole of the carbon-12 isotope avagadro constant 10 of 35 the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope mole 11 of 35 the mass per mole of a substance. molar mass 12 of 35 the simplest whole-number ratio of atoms of each element present in a compound empirical formula 13 of 35 a small group of atoms held together by covalent bonds molecule 14 of 35 the actual number of atoms of each element in a molecule molecular formula 15 of 35 the volume per mole of a gas molar volume 16 of 35 the amount of solute, in mol, dissolved per 1dm3 of solution concentration 17 of 35 a solution of known concentration. normally used in titrations to determine unknown information about another substance standard solution 18 of 35 any type of particle that takes part in a chemical reaction species 19 of 35 the molecular relationship between the relative quantities of substances taking part in a reaction stoichiometry 20 of 35 a species that is a proton donor acid 21 of 35 a species that is a proton acceptor base 22 of 35 a type of base that disolves in water forming hydroxide ions alkali 23 of 35 any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion salt 24 of 35 a positively charged ion cation 25 of 35 a negatively charged ion anion 26 of 35 a crystalline compound containing water molecules hydrated 27 of 35 a substance that contains no water molecules anhydrous 28 of 35 water molecules that form an essential part of the crystalline structure of a compound water of crystallisation 29 of 35 a measure of the number of electrons that an atom uses to bond with atoms of another element oxidation number 30 of 35 loss of electrons or an increase in oxidation number oxidation 31 of 35 gain of electrons or a decrease in oxidation number reduction 32 of 35 a reaction in which both reduction and oxidation take place redox reaction 33 of 35 a reagent that reduces (adds electrons to) another species reducing agent 34 of 35 a reagent that oxidises (takes electrons from) another species oxidising agent 35 of 35
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