The elements with atomic numbers 101 and 104 belong to, respectively:

Question

Canvas Classes · Accepted Answer

Strategy:
 Use electronic configurations to classify elements. Atomic numbers in the  series belong to actinoids, while those following the -block fill the -subshell of various groups.

Step 1: Analyze Z = 101
-  is Mendelevium (Md).
- Configuration: .
- Since the  orbital is being filled, it belongs to the Actinoid series.

Step 2: Analyze Z = 104
-  is Rutherfordium (Rf).
- Configuration: .
- The last electron enters the  subshell. Group number .

The elements are an Actinoid and a Group 4 ele

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