Question

why iodine shows both positive and negative oxidation state?​

Answer 1

Answer:

The polarizability and electronegativity of iodine is responsible for the negative oxidation states like NaI, AgI etc..

Whereas when iodine combines with higher electronegative atoms (oxygen, fluorine), it attains positive oxidation state.

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Answer 2

Answer:

Iodine could exist in both the positive and negative oxidation states. The polarizability and electronegativity of iodine is responsible for the negative oxidation states like Nal,Alg etc whereas when iodine combines with higher electronegative atom it attains positive oxidation state

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