Question

That the electronic configuration of ytterbium $\left(Z=70\right)$ is $4f^{14}5s^2$ and that of lutetium $\left(Z=71\right)$ is $4f^{14}5d^{1}6s^2$ can be explained on the basis of

• A. the extra stability of the half- filled orbitals cones
• B. the extra stability of the completely filled orbitals
• C. the usual rules for the arrangement of electrons in their orbits
• D. None of these

Answer 1

Answer: (C)

Ytterbium and lutetium follow the usual rules for the arrangement in their orbits