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08/10/2021 1:55 pm
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(a) How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table?
(b) How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?
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08/10/2021 1:56 pm
(a) In group 1 of alkali metals, the chemical reactivity increases from lithium to francium.
(b) In group 17 of halogen elements, the chemical reactivity decreases from fluorine to iodine.