In general the electronic configuration of outer orbitals of these elements
is (n-1)d
1– 10ns
1–2except for Pd where its electronic configuration is 4d105s0 The (n–1) stands for the inner d orbitals which may have one to ten
electrons and the outermost ns orbital may have one or two electrons However, this generalisation has several exceptions because of very
little energy difference between (n-1)d and ns orbitals Furthermore,
half and completely filled sets of orbitals are relatively more stable