Question

In this diagram,

The oxidation state "x" should be:

• A. 0.0
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B 2

We know that, as energy increases stabilty of the element decreases. Here, most stable oxidation state of maganese is +2.
Because electronic configuration of $M{n}^{2+}$ is $\left[Ar\right]3d^{5}4s^0$. More energy is needed to remove further electrons from $M{n}^{2+}$.