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

Explanation

In the modernn periodic table, each period beging with filling of a new principle energy level. Therefore, the sixth period starts with the fillint of principal quantum number, n=6. in the sixth period elements, the electron first enters the 6s-orbital and then from left to right across a period the electrons enter the 4f, 5d and 6p orbitals of the elements. filling of electrons in orbitals in case of 6th period continuous till new principal energy level of quantum number, n=7 begins, i.e., for elements of sixth period, electrons fill up the 6s, 4f, 5d and 6p orbitals total number of orbitals in the case=1+7+5+3=16. since, each orbital can accommodate maximum two electrons, there can be `6xx2` or 32 elements in sixth period.