Question

In which block most of the elements showing positive oxidation state and negative oxidation state are included? ​

Answer 1

Answer:

Iodine (I) could exist in both the positive and negative oxidation states. 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.

Answer 2

Sulphur, phosphorus and chlorine can form compounds with positive and negative oxidation state

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