Rules for IUPAC name having atomic number greater than 100
Number Root
0 nil
1 un
2 bi
3 tri
4 quad
5 pent
6 hex
7 sept
8 oct
9 enn
The name is derived directly from the atomic number of the element using the above latin numerical roots.
The roots are put together in the order of the digits which make up the atomic number and terminated by ‘ium′ to spell out the name. The symbol of the element is composed of the initial letters of the numerical roots which make up the name.
IUPAC name of element with atomic number 120
The root for 1 is un
The root for 2 is bi
The root for 0 is nil
Hence, the IUPAC name for the element with atomic number 120 is unbinilium and its symbol is Ubn.
Final answer:
IUPAC name ⟶ Unbinilium
Symbol ⟶ Ubn