As we have seen, the periodic table is a result of empirical observation (i.e., the periodic law), but quantum-mechanical theory explains why the table is so arranged. Suppose that, in another universe, quantum theory was such that there were one s orbital but only two p orbitals (instead of three) and only three d orbitals (instead of five). Use the drawing of the first four periods of the periodic table in this alternative universe to answer the following questions.
Which elements would be the equivalent of the noble gases?
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