The elements `Z = 117` and `120` have not yet have been discovered, In which family`//`group would you place these elements and also give the electronic configuration in each case.

Explanation

We see from Fig. 3.2, that element with Z = 117, would belong to the halogen family (Group 17) and the electronic configuration would be `[Rn] 5f^(14)6d^(10)7s^(2)7p^(5)`. The element with Z = 120, will be placed in Group 2 (alkaline earth metals), and will have the electronic configuration `[Uuo]8s^(2)`.