When elements from a group exhibit more than one oxidation state,
A)the higher oxidation state is more important as one goes down a group.
B)the lower oxidation state is more important as one goes down a group.
C)both oxidation states are equally important throughout the group.
D)the oxidation state will be affected by the elements on either side of it in the period.
E)None of these choices are correct.

Question

Quizplus · Accepted Answer

The lower oxidation state becomes more stable or more important as one goes down a group in the periodic table. This is due to the inert pair effect, where the inner s electrons are less willing to participate in bonding due to increased electron shielding and relativistic effects, making the lower oxidation states more favored.

When Elements from a Group Exhibit More Than One Oxidation