8.22  Consider the elements: Cs, Ne, I and F (a) Identify the element that exhibits only negative oxidation state.(b) Identify the element that exhibits only positive oxidation state(c) Identify the element that exhibits both positive and negative oxidation states(d) Identify the element which exhibits neither the negative nor does the positive oxidation state.

(a)$F$ (because of highly electronegative in nature)

(b)$Cs$ (highly electropositive)

(c)$I$(has emplty d orbitals)

(d) $Ne$ (enert gas

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