Question

Which can have both positive and negative oxidation states in their compounds f i na al?

Answer 1

Being a highly electronegative atom in a periodic table, Fluorine (F) always possesses -1 oxidation state.

Due to high electropositive nature, alkali metals like Sodium (Na) only has +1 oxidation state.

While aluminium (Al) exist with various positive oxidation state because of its ease of acceptance of electrons to vacant d-orbitals.

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. For example, IF5. The oxidation state of Iodine on IF5 is +5.

So Iodine (I) can exist in both positive and negative oxidation states.

Answer 2

Answer:

Iodine

Explanation: