Question

Atomic number of the element ununtrium is 113. According to $IUPAC$ system of nomenclature, the numerical roots for $1,1$ and $3$ are un, un and tri respectively.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (A)

If both assertion and reason are true and reason is the correct explanation of assertion.

Answer 2

The atomic number of the elements above atomic number 100 were given a systematic nomenclature by IUPAC which can be derived directly from the atomic number of the element using the numerical roots for o and numbers 1-9. The names were ended with '-ium' suffix. They have three-letter abbreviation using the first letter of each number. According to IUPAC systematic nomenclature, the numerical roots for 1,1 and 3 are un, un and tri, respectively. Thus, an element with atomic number 113 has its name as Ununtrium (Uut)