Which one of the following elements shows both positive and negative oxidation states?

Caesium

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Fluorine

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Iodine

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Xenon

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Solution

The correct option is D Iodine
The atomic size of Iodine is very big and it has empty $d$ orbitals to expand it's electron in $s$ and $p$ orbitals In $3^{r d}$ excited state iodine has 7 unpaired electrons so it can show positive oxidation state with higher electronegative element like $C l, B r, F$ . Generally all halogens exhibit negative oxidation state due to their electronegativity.

Hence option C is the answer.

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Similar questions

Consider the elements:
Cs, Ne, I and F
Identify the element that exihibits only negative oxidation state.

Identidy the elements that exihibits only positive oxidation state.

Identify the element that exhibits both positive and negative oxidation states.

Identify the element which exihibits neither the negative nor does the positive oxidation state

The element which shows only negative oxidation state/s among following elements is:

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 postive oxidation state.

(d) Identify the element which exhibits neither the negative nor does the positive oxidation state.

C s, N e, I

F

F_{2}

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