Chemistry 3.5 / 5 based on 2 ratings ? ChemistryGCSEAQA Created by: Yasmin ****Created on: 10-03-13 14:19 Group 1 reactivity... Increases as you go down 1 of 5 Halogens reactivity... Decreases as you go down 2 of 5 Exothermic energy change is ... Negative 3 of 5 Endothermic energy change is... Positive 4 of 5 Halogens form... Ionic bonds with metals 5 of 5
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