Question

The IUPAC nomenclature of an element with electronic configuration [Rn] 5f¹⁴6d¹7s² is

• A. Unnilbium
• B. Unnilunium
• C. Unnilquadium
• D. Unniltrium

Answer 1

The Correct Option is D

The question asks for the IUPAC nomenclature of an element with the electronic configuration [Rn] 5f¹⁴ 6d¹ 7s².

1. The given electronic configuration corresponds to 89 protons in the nucleus. This configuration is specific to the element with atomic number 89, which is Actinium (Ac).
2. However, the options provided refer to systematic IUPAC names that are typically reserved for elements with atomic numbers beyond 100.
3. The term Unniltrium refers to the element with the systematic IUPAC name based on its atomic number. The designation "Unniltrium" was used for the temporary naming of the element with atomic number 103.
4. Therefore, there appears to be a discrepancy between the given electronic configuration (Actinium) and the answers provided. Nonetheless, based on the given options, matching the systematic nomenclature, "Unniltrium" (103) is the correct answer corresponding to the options provided, which aligns with temporary systematic names: Un+nil+trium (103).

In conclusion, based on the options, the correct IUPAC nomenclature for the configurations provided and matching logic with the given set is Unniltrium, corresponding to the element with atomic number 103.