Group 1 elements: The alkali metals, Reactivity increases moving down the group, Atomic radius increases moving down the group, Form 1+ ions, Form cations, Metals , Boiling point decreases moving down the group, A group of silver, soft, reactive metals, Stored under oil, Group 7 elements: The halogens, Reactivity decreases moving down the group, Atom size increases moving down the group, Form 1- ions, Form anions, Non metals, Boiling point increases going down the group, Strong oxidising agents that consist of diatomic molecules, Vaporise at room temperature,

Group 1 and group 7 elements

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