Topic 10 0.0 / 5 ? ChemistryGroup 7ASAQA Created by: Jemma1494Created on: 03-06-21 17:15 What ions do group 7 halogens form -1 anions 1 of 11 Group 7 atomic radius trend Increases down group 7 Due to increased e- shielding 2 of 11 Group 7 boiling point trend Increases down group 7 Due to larger molecules having stronger van der waal forces 3 of 11 Halogens reactions with hydrogen Halogen + hydrogen -> acid 4 of 11 Halogen reactions with metal Halogen + metal -> salt 5 of 11 Chlorine uses Chlorine is a disinfectant for water Cl2 + H2O ⇌ HClO + HCl 6 of 11 Group 7 electronegativity trend Decreases down group 7 7 of 11 Group 7 oxidising ability trend Decreases down the group Due to increases e- shielding 8 of 11 Group 7 halide ions reducing ability trend Increases down the group Due to increased e- shielding 9 of 11 Halide ion test AgNO3 Cl = white precipitate, dissolves in NH3(aq) Br = cream precipitate, dissolves in NH3(l) I = yellow precipitate, doesn’t dissolve in NH3(l) 10 of 11 Displacement reactions More reactive halogens displace less reactive halogens Reactivity decreases down group 11 of 11
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