3(iii)
Arrange the following as per the instructions given in the brackets:
(a) Mg, S, Si, P [decreasing order of atomic size]
(b) Cl, I, Br, F [increasing electronegativity]
(c) K, Na, Rb, Li [decreasing metallic character]
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(a) Mg > Si > P > S.
(b) I < Br < Cl < F
(c) Rb > K > Na > Li