Question

if we take atomic no of iron the electronic configuration of iron will be 2,8,8,8 but if there are 8 electrons in the outer shell it becomes stable... so is iron stable?? why its valency is still 2 or 3??

Answer 1

Answer:

Explanation:

iron is the most stable.

In some cases, iron can also give away either of the paired electrons form 3d orbital. As a result, the whole 3d orbital is filled with unpaired electrons that deliver a more stable configuration. In such a situation, the valency of iron will be +3.