The element Z=117 has not been discovered. In which group would you place these element and also give the electronic configuration. 

Explanation

We see from 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)`