Question

Among Group 16 elements, which one does NOT show -2 oxidation state?

• A. O
• B. Se
• C. Te
• D. Po

Answer 1

The Correct Option is D

Group 16 elements, also known as the chalcogens, generally exhibit oxidation states of -2, +2, +4, and +6. Oxygen (\(<\text{O}>\)) is the most electronegative element in this group and readily forms the -2 oxidation state. As you move down the group, the ability of the elements to form the -2 oxidation state decreases due to increasing atomic size and decreasing electronegativity.

Among the options given:

• Oxygen (\(\text{O}\)): Commonly shows a -2 oxidation state.
• Selenium (\(\text{Se}\)): Can show a -2 oxidation state.
• Tellurium (\(\text{Te}\)): Also capable of a -2 oxidation state.
• Polonium (\(\text{Po}\)): Generally does not form a -2 oxidation state due to its metallic nature and instability.

The correct answer is that Polonium (\(\text{Po}\)) does not typically show a -2 oxidation state due to its position at the bottom of Group 16 and its tendency to exhibit metallic properties rather than non-metallic ones.