AQA GCSE Chemistry Unit 3 Key Knowledge A crossword testing your knowledge of key parts of the chemistry syllabus. 3.0 / 5 based on 1 rating ? ChemistryGCSEAQA Created by: Sam KellettCreated on: 05-04-13 12:12 Who is considered to be the father of the modern periodic table? Dmitri Mendeleev 1 of 16 Going up group 1 the reactivity _________ Decreases 2 of 16 Group 1 elements are also called? Alkali Metals 3 of 16 Going up group 7 the reactivity ________________ Increases 4 of 16 Group 7 elements are also called? Halogens 5 of 16 Which group on the periodic table has the properties; dense; strong; good conductors and high melting points? Transition metals 6 of 16 What does soap form in hard water? Scum 7 of 16 Which type of water hardness can be removed by heating? Temporary 8 of 16 What is the only harmful affect of fluoridation? Fluorosis 9 of 16 In the equation Q=mcΔT what does the c stand for? Specific heat capacity 10 of 16 In a flame test what colour does Potassium turn the flame? Lilac 11 of 16 If you were burning a chemical in a flame and the flame went yellow what was in the chemical? Sodium 12 of 16 If a substance containing copper(II) ions was added to sodium hydroxide solution what colour would the precipitate be? Blue 13 of 16 What do you use to test for Carbonate ions? Hydrochloric Acid 14 of 16 When testing for halide ions what colour precipitate would bromide ions create? Cream 15 of 16 What do you add after dilute hydrchloric acid to test for sulfates? Barium Chloride 16 of 16
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