Question:

Identify inner transition element from following.

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Inner transition elements are the f-block elements, the lanthanoids and actinoids.
Updated On: Nov 12, 2026
  • Sm
  • Pd
  • Cd
  • Au
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Concept
Inner transition elements are the f-block elements. They are the lanthanoids (Z = 57 to 71) and the actinoids (Z = 89 to 103).

Step 2: Check each element
Sm has Z = 62, which lies in the lanthanoid series. Pd (46), Cd (48) and Au (79) are d-block elements.

Step 3: Conclusion
Only samarium is an f-block element.

Final Answer:
The inner transition element is Sm. \[ \boxed{\text{(A) }\text{Sm}} \]
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