What is the most stable oxidation state for Bi in bismuth compounds?
A)-2
B)+1
C)+3
D)+2

Question

Quizplus · Accepted Answer

The most stable oxidation state for Bi in bismuth compounds is +3. This is because Bi is a post-transition metal and has a tendency to lose its 3 outermost electrons to attain a stable configuration of a completely filled 6s shell. While Bi can also attain an oxidation state of +5, it is less stable due to the large size of the Bi atom which makes it difficult for it to attract more electrons towards itself. Therefore, the correct choice is C.

What Is the Most Stable Oxidation State for Bi in Bismuth