Question

The atomic number of Unq is:
A.102
B.103
C.104
D.105

Answer 1

Hint: Almost all elements have been given or assigned an IUPAC certified name. Many times it so happens, that we refer to an element by its commonly known name (e.g. Tungsten).

Complete step by step answer:
Similarly the elements after the atomic number 100, have a special case of nomenclature along with their commonly known names. These rules can be described as follows:
The name of element is derived from the atomic number of the element using the numeric roots as given below:
0 = nil ; 1 = un ; 2 = bi ; 3 tri ; = 4 = quad ; 5 = pent ; 6 = hept ; 7 =sept; 8 = oct ; 9 = enn
 These roots are then arranged in the order of the digits of the atomic number of the element. The name of the element will be terminated by the suffix ‘-ium’. The final 'n' of 'enn' is elided when it occurs before 'nil', and the final 'i' of 'bi' and of 'tri' when it occurs before 'ium'.
The symbol of the corresponding element is then written in the form such that the first letter of each root in the name is displayed in its correct order.
by following these rules, we can decipher the atomic number of Unq as 104

Hence, Option C is the correct option.

Note:
Elements that have atomic numbers from 101 to 103 have pre-determined names and corresponding two letter symbols that have been approved by IUPAC. The status of these names and symbols is in no way affected by the recommendation of systematic names for elements of atomic numbers greater than 100.