Identify the group and valency of the elements having atomic number 119. Also predict the outermost electronic configuration and write the general formula of its oxide.

Answer

A

Explanation

The present set up of the Long term periodic, table can accomodation maximum 118 elements. Thus, in accordance withaufbau principles, the filling of the Bs-orbital will occur. In other words, 119th electron will enter Bs-orbitals. As such its outmost electronic configuration will be `8s^(-1)`.
Since, it has only one electron in the varies shell i.e., Bs, therefore, its valency will be 1 and it will lie in the group [A along with alkali metals and the formula of its oxide will be `M_(2)O` where M represents the element.