Chapter 41, Problem 41.34E

(a)

To determine

The value of $Z_{\text{eff}}$ for the $2s$ state of lithium.

(b)

To determine

The value of $Z_{\text{eff}}$ for the $4s$ state of potassium.

(c)

To determine

The comparison of the $Z_{\text{eff}}$ values of $2s$ state of lithium, $3s$ state of sodium, the $4s$ state of potassium and the explanation for the trend seen.