Unnilennium is the systematic name for element having atomic number

Options

A. `113`
B. `115`
C. `117`
D. `109`

Answer

D

Explanation

The systematic name is derived directly from the atomic number using the suitable numerical roots for the digits. The roots are strung together in the order of digits which make up the taomic number and ''ium'' is added at the end. The numerical root for `1` is `un` and for `9` is enn.