c4 0.0 / 5 ? ChemistryGCSEOCR Created by: HannahCreated on: 17-05-13 11:06 What charge does a neutron have? neutral 1 of 40 What charge does a proton have? possitively charged 2 of 40 What charge does a electron have? negatively charged 3 of 40 What is a nucleus? middle of the atom, contains protons and neutrons 4 of 40 What is an isotope they are different forms of the same element, which have the same number of protons but different number of neutrons 5 of 40 What is ionic bonding? the transferring of electrons 6 of 40 What is covalent bonding? the sharing of electrons 7 of 40 Whats the name for group 1 metals? Alkali metals 8 of 40 Whats the name for group 7 metals? Halogens 9 of 40 What is reduction? the gaining of electrons 10 of 40 What is oxidaton? the loss of electrons 11 of 40 Halogens react with Alkali metals to form..... Salt called metal halides 12 of 40 What structure do metals have? A crystal structure 13 of 40 What propeties do most metals have? (name 4) high melting and boiling point, high density and lustrous 14 of 40 Why are metals good conductors? they have a sea of decalised electrons which move freely through the metal 15 of 40 what tempreture do need to make superconductors -265 16 of 40 When is the iron catalyst used? during the harbour process 17 of 40 When is the nickel catalyst used? for the hydrogenation of alkenes 18 of 40 Iron (ii) compounds are... light green 19 of 40 Iron (iii) compounds are.... orange/brown 20 of 40 copper compounds are..... blue 21 of 40 What is thermal decomposition? its when a substance breaks down when its heated 22 of 40 when copper(ii) carbonate is decomposed it forms? copper oxide and carbon dioxide 23 of 40 What colour does limewater turn when carbon dioxide is present? milky 24 of 40 What is a precipitation? when two solutions react and an insoluble solid forms in the solution 25 of 40 Copper (ii) hydroxide is a ......... solid blue 26 of 40 Iron (ii) hydroxide is a ............ solid grey/green 27 of 40 Iron (iii) hydroxide is a ............ solid orange/brown 28 of 40 Where do we get water from in the UK? Surface water and Ground water 29 of 40 What is surface water? lakes, rivers and reservoirs 30 of 40 Whats is ground water? aquifers (rocks that trap water underground.) 31 of 40 What are the 3 steps for purifying water? 1) Filtiration 2) Sedimentation 3) Chlorination 32 of 40 Whats happens in filtiration? a wire mesh screens out large twigs ect and then gravel and sand beds filter out any other solid bits 33 of 40 What happens in Sedimentation? iron sulfate or aluminium sulfate is added to the water, which makes the fine particles clump together and settle at the bottom. 34 of 40 What happens in Chlorination? chlorine gas is bubbled through to kill any harmfull bacteria and microbes 35 of 40 What do you use to test for sulfate ions? barium chloride 36 of 40 What do you use to test for halide ions? silver nitrates 37 of 40 Chlorine ions produce a .......... percipitate white 38 of 40 Bromide ions produce a .......... percipitate cream 39 of 40 Iodide ions produce a .......... percipitate yellow 40 of 40
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