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On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.

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Sixth period corresponds to n = 6. In this period 16 orbitals, viz, one 6 s, seven 4f, five 5d and three 6p orbitals are filled. These sixteen orbitals can accommodate 32 elements. So, there are 32 elements in the sixth period.

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