If IUPAC name of an element is "Unununnium" then the element belongs to nth group of periodic table. The…

Unununnium is the IUPAC name given to the element Roentgenium and the atomic number $111$. In the periodic table in the $7^{\mathrm{th}}$ period it is located and placed in the ${11}^{\mathrm{th}}$ group. Roentgenium is a radioactive element and its isotopes are unstable in nature.

$111$ belongs to ${11}^{\mathrm{th}}$ group.

Hence the value of n is $11$.