Question

According to IUPAC nomenclature, a newly discovered element has been named as Uun. This atomic number of the element is

• A. 111
• B. 112
• C. 109
• D. 110

Answer 1

The correct option is D

110

The explanation of the correct option:

(D)

• According to IUPAC nomenclature, a newly discovered element has been named as Uun. The atomic number of the element is 110. The name of the element is Darmstadtium.
• It is an extremely radioactive synthetic element.

The explanation of the incorrect option:

(A) 111 is the atomic number of the Roentgenium element and its symbol is $\mathrm{Rg}$

(B) 112 is the atomic number of the Copernicium element and its symbol is $\mathrm{Cn}$.

(C) 109 is the atomic number of the Meitnerium element and its symbol is $\mathrm{Mt}$.

So, the correct option is ‘D’. The atomic number of the element is 110. The name of the element is Darmstadtium.