In an atom, all the five 3d orbitals are equal in energy in free state i.e., degenerate. - The shape of dx2−y2 is different then shape of dz2
- The size of orbital depends on principal quantum number ' n ' therefore all the five 3d orbitals are different in size when compared to the respective 4d orbitals. - Shape of orbitals depends on azimuthal quantum number 'l' therefore shapes of 4d orbitals are similar to the respective 3d orbitals.