Group 7- halogens 0.0 / 5 ? ChemistryHalogensGCSEEdexcel Created by: LaurenkjCreated on: 25-11-18 11:00 How do halogens react They react by gaining the one electron to form ions with a -1 charge. They form Halfords de ions/compounds 1 of 11 What is fluorine at room temp and what colour is it A gas and pale yellow 2 of 11 Uses of fluorine Fluoride is in toothpaste/mouth wash (kills microbes) 3 of 11 What is chlorine at room room temp and what colour Gas and Pale green 4 of 11 Uses for chlorine In Swimming pools and bleach (kills microbes) 5 of 11 Bromine at room temp and colour Liquid and red/brown 6 of 11 Uses for bromine Pesticide and insecticide 7 of 11 Iodine at room temp and and colour Solid and dark grey, forms purple vapour 8 of 11 Uses iodine Test for starch, antiseptic (kills microbes) 9 of 11 What do halogens react with and what do they form React with metals to form halide salts 10 of 11 Example of a chemical reaction of halogens 2Na + Cl2 —> 2NaCl -sodium chloride (table chloride) 11 of 11
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