Answer:
Iron has a valency of 2+
Step-by-step explanation:
The atomic number for Fe is 26, so that makes the electron configuration 2.8.8.8.2 so if you take the no. of electron it will be 2, so it will have to loose the two electrons in order to fill it's outermost electrons.
So it will develop a valency - 2+
Remember as you loose an electron the valency will be a positive but if you gain an electron the charge will be a negative