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

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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 0 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)

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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