How can we identify the number of group from electronic configration of any element if it ended in 3d^8 4S^2 I know group no. = total no. of valence but whats the valence here in this situation?
The electron configuration must finish like this:
The element is Nickel (
The period is identified looking at the level of energy (
The group number is normally related to the valence electrons. However, this relation does not include the transition metals from group