On the basis of quantum numbers justify that the sixth period
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On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements. ... For n = 6, azimuthal quantum number (l) can have values of 0, 1, 2, 3, 4. According to Aufbau's principle, electrons are added to different orbitals in order of their increasing energies.
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When n = 6, l = 0,1, 2, 3, 4, 5. The order in which the energy of the orbitals increases is 6s < 4f < 5d < 6p. The total number of orbitals available are 16 [s = 1, p = 3, d = 5; / = 7]. The maximum number of electrons which an orbtial can contain is 2. Therefore the sixth period can accomodate 32 elements.
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