Question

Which one of the following elements can show both positive and negative oxidation state ? A) F B) I C) Li D) He​

Answer 1

Answer:

Option b - Iodine

Explanation:

Among F, I , Li and He, F is the most electronegative, hence it will always have a  negative oxidation state (OS), Li being a metal will show positive OS and He being a noble gas shows 0 OS, whereas I being a non metal can show negative OS with metals and positive OS with non metals that have higher electronegativity

Answer 2

Answer:

B. Iodine✔

Explanation:

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 3rd excited state iodine has 7 unpaired electrons so it can show positive oxidation state with higher electronegative element like Cl,Br,F. Generally all halogens exhibit negative oxidation state due to their electronegativity.

Fluorine, Show Positive Oxidation State With Oxygen Only. (Mostly Negative)

Li is Alkalis Metal, So it doesn't Show Negative oxidation state ( Show Only Positive Oxidation state).

Hilium is an inert gas, so, It doesn't Form Any Oxidation state (Unreactive)

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