Question

I my chemistry book electron configuration of of iron is 2 8 14 2 but by using formula of 2 (n)square shells have capacity of 2 8 18 so tell me why there is 14 in 3rd shell it has to be 16

Answer 1

Iron is a prototype of element iron Aldo have some other forms say fe(I)
Fe(II) fe(III) .
So don't worry learn what your textbook says.