Among Group 16 elements, which one does NOT show -2 oxidation state?
- O
- Se
- Te
- Po
The Correct Option is D
Solution and Explanation
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.
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