Question

Arrange the following:

(a) Elements of group 1, in increasing order of reactivity.

(b) Elements of group 17, in decreasing order of reactivity.

(c) He, Na, Mg (increasing order of melting point).

(d) Chlorine, sodium, magnesium (increasing reducing character).​

Answer 1

Answer:

a) Increasing order of reactivity- Li < Na < K < Rb Cs < Fr

(Down the group metallic character increases, therefore reactivity also increases)

b) Decreasing order if reactivity- F > Cl > Br > I

( Down the group non-metallic character decreases, therefore reactivity decreases)

c) Increasing order of melting point- He < Na < Mg

( Strong metallic bonding results higher melting point)

d) Increasing order of reducing character- Cl < Mg < Na

(Metallic character increases reducing character increases)

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Answer 2

EXPLANATION

Answer:

a) Li < Na < K < Rb < Cs

b) F > Cl > Br > I

c) He < Na < Mg

d) Cl < Mg < Na

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