Solution: General energy ordering of orbitals for a many-electron atom.Not all of the orbitals in the n exttip{n}{n}= 4 shell are shown in this figure. Which subshells are missing?

Problem

The energies of subshells follow the order: ns is less than np is less than nd is less than nf. Orbitals in any subshell are degenerate (have the same energy). The subshells shown are as follows (in order of increasing energy with number of orbitals in parentheses): 1s (1 orbital), 2s (one orbital), 2p (three orbitals), 3s (1), 3p (3), 4s (1), 3d (5), 4p (3).
General energy ordering of orbitals for a many-electron atom.

Not all of the orbitals in the n = 4 shell are shown in this figure. Which subshells are missing?

Solution

We’re being asked to determine which subshells from n = 4 are missing from the given diagram.

Let’s refer to the illustration of the periodic table below:

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