Chapter 5, Problem 14P

Spectroscopic studies of Li also show that $Z_{\text{eff}}\left(\text{2}p\right)=\text{1}.\text{02}$ . Estimate the energy of the 2p orbital of Li. Calculate the average distance of the electron from the nucleus in the 2p orbital of Li. Comparing your results with those in Problem 13 shows that the energy values differ by about 50%, whereas the average distances are nearly equal. Explain this observation.