: Exercise :
1. Observe the Modern Periodic Table and explain the gradation in reactivity of Halogen family.
2. What are the similarities in properties of elements in Halogen family?
3. Why does Inert gases placed in Zero group?
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Answer:
1: gradation in reactivity of halogen family is increase by going from bottom to top where Florine have most reactive Element
2: the only family who can react with each other . they are monoatomic etc.
3: inert gases are the group who does not take part in any reaction. bcoz they have zero valency and there outermost fileld is fulfilled
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