The IUPAC nomenclature of an element with electronic configuration [Rn] 5f 6d 7s is:

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Strategy:
 Identify the atomic number by summing the electrons in the configuration. Then, apply the IUPAC nomenclature rules for that atomic number.

Step 1: Calculate Atomic Number
Configuration: 
.

Step 2: Apply IUPAC roots
For :
- 1  un
- 0  nil
- 3  tri
- Suffix  ium

Name: Unniltrium.

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