We saw in Chapter 6 that the probability of finding an electron in three-dimensional space depends on what orbital it is in. Look back at Figures 6.19 and 6.22, which show the radial probability distribution functions for the s orbitals and contour plots of the 2p orbitals, respectively.
(a) Which orbitals, 2s or 2p, have more electron density at the nucleus?
(b) How would you modify Slater's rules to adjust for the difference in electronic penetration of the nucleus for the 2s and 2p orbitals?

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1s 2s 3s 2 P. Pr Py