Question:
Which from following is NOT a transition element?
Which from following is NOT a transition element?
Show Hint
Holmium belongs to the lanthanoid series, which is the inner transition (f-block) series.
Updated On: Nov 13, 2026
- Mo
- Co
- Ho
- Ti
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Transition elements are d-block elements with partly filled d orbitals. The f-block elements (lanthanoids and actinoids) are inner transition elements.
Step 2: Classify the options
Mo (Z = 42), Co (Z = 27) and Ti (Z = 22) are d-block elements.
Ho (Z = 67, holmium) is a lanthanoid, so it is an f-block element.
Step 3: Match
The element that is not a transition element is Ho, option (C).
Final Answer:
Holmium (Ho) is not a transition element. \[ \boxed{\text{(C) }\text{Ho}} \]
Transition elements are d-block elements with partly filled d orbitals. The f-block elements (lanthanoids and actinoids) are inner transition elements.
Step 2: Classify the options
Mo (Z = 42), Co (Z = 27) and Ti (Z = 22) are d-block elements.
Ho (Z = 67, holmium) is a lanthanoid, so it is an f-block element.
Step 3: Match
The element that is not a transition element is Ho, option (C).
Final Answer:
Holmium (Ho) is not a transition element. \[ \boxed{\text{(C) }\text{Ho}} \]
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