State the trend in chemical reactivity :

(ii) down the group.

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Solution

Down the group, the chemical reactivity of the elements increases.

As atomic size increases down the group the tendency to lose electrons increases.

Therefore, the chemical reactivity increases down the group.

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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?

State the trend in chemical reactivity :

(i) across the period left to right

Explain the increase in chemical reactivity of metals as we go down the group.

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