If an atom has electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$,it will be placed in

The atomic number of Unnilunium is $...........$

The element with atomic number $12$ belongs to ......... group and ......... period.

In the modern periodic table,the period indicates the value of:

The elements with atomic numbers $Z=117$ and $Z=120$ have not yet been discovered. In which family or group would you place these elements,and what would be their expected electronic configuration?

Which of the following is the incorrect match for the atom of an element?