Question

What will be the IUPAC symbol and name for the element with atomic number $123?$

• A. Unt and Unniltrium
• B. Ubq and Unbiquadium
• C. Ubt and Unbitrium
• D. Unb and Unnilbium

Answer 1

Answer: (C)

Element with atomic number $123$.

Number	Root
0	nil
1	un
2	bi
3	tri
4	quad
5	pent
6	hex
7	sept
8	oct
9	enn

- 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 letter of the numerical roots, which make up the name.
Hence, symbol for atomic number $123$ is $Ubt$ and $IUPAC$ name is unbitrium.