Question

explain the IUPAC of an element whose atomic number is greater than 100

Answer 1

According to the rules of IUPAC
nil stands for 0
Un stands for 1
Bi for 2
Tri for 3
Quad for 4
Pent for 5
Hex for 6
Sept for 7
Oct for 8

So if we were to name the 111th element then it would be Un un unium or simply the symbol would be Uuu.
112 would be Uub
And so on.

Hope this helps you