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

To determine the group and electronic configuration for the elements with atomic numbers Z = 117 and Z = 120, we can follow these steps:

### Step 1: Determine the Electronic Configuration for Z = 117
1. **Identify the nearest noble gas**: The nearest noble gas before Z = 117 is Radon (Rn), which has an atomic number of 86.
2. **Add the electrons**: We need to account for the additional electrons beyond Radon to reach atomic number 117.
- Radon (Rn): 86 electrons
- 4f subshell can hold 14 electrons: 4f14
- 5d subshell can hold 10 electrons: 5d10
...