Chemisty Atom, Bonds Groups Part 1 4.5 / 5 based on 2 ratings ? ChemistryBonding & shapesASWJEC Created by: Tavneet BalCreated on: 05-04-13 12:42 Isotopes are atoms of the same element with a different number of what? Neutrons 1 of 19 What is used as the standard measurement for relative isotopic mass? Carbon-12 2 of 19 The ........... formula is the simplest whole-number ratio of atoms of each element present in a compound. Empirical 3 of 19 At room temperature and pressure what is the volume per mole of gas molecules? 24.0dm(3^) 4 of 19 The .......... of a solution is the amount of solute in mol, dissolved per 1 dm(3^) of solution. Concentration 5 of 19 What is the amount, in mol, of NaOH dissolved in 25.0 cm(3^) of an aqueous solution of concentration 0.0125 mol dm (-3^)? 3.125 x 10(-4^) mol 6 of 19 An acid is a species that is a .......... donor. Proton 7 of 19 A base is a species that is a proton ....... . Acceptor 8 of 19 An ........ is a type of base that dissolves in water forming hydroxide ions, OH(-^) (aq) ions. Alkali 9 of 19 A ....... is a positively charged ion. Cation 10 of 19 An ......... is a negatively charged ion. Anion 11 of 19 Hydrated refers to a crystalline compound containing ........ molecules. Water 12 of 19 What refers to water molecules that form an essential part of the crystalline structure of a compound? Water of crystallisation 13 of 19 What is the oxidation number combined oxygen? -2 14 of 19 What is the oxidation number of an uncombined element? 0 15 of 19 The oxidation number is the number of ........... that an atom uses to bond with atoms of another element. electrons 16 of 19 What is the gain of electrons or a decrease in oxidation number? Reduction 17 of 19 A redox reaction is a reaction in which..... both reduction and oxidation takes place. 18 of 19 An ................... is a reagent that oxidises (takes electrons from) another species. oxidising agent 19 of 19
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