The complex which has no d-electron in the central metal atom is .

The complex ion which has no 'd' electrons in the central metal atom is _________.

The complex ion which has no 'd'-electrons in the centre metal atom is

The complex which has no 'd' electrons in the central atom is (Atomic number, Cr= 24, Mn = 25, Fe = 26, Co = 27)

The complex ion which has no.'d' electrons in the central metal atom is :