Question

The elements ($z=117$ and $120$) have not yet been discovered in which family or group would you place these elements and also give electronic configuration in each case?

Answer 1

Atomic number $Z=117$

Number of protone $=117$

Electronic configuration is $\left[Rn\right]s{f}^{4}6d^{10}7s^{2}7p^5$

Belong to group 17 - halogen family

Atomic number $=z=120$

Electronic configuration is $\left[440\right]8s^2$

element belong to group 2 - alkali earth family