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Question: Answered & Verified by Expert
The lanthanoid that does NOT show + 4 oxidation state is:
Chemistryd and f Block ElementsJEE MainJEE Main 2020 (06 Sep Shift 1)
Options:
  • A  Dy
  • B  Ce
  • C Eu
  • D Tb
Solution:
1869 Upvotes Verified Answer
The correct answer is: Eu
   Eu(z=63)=4F76s2
Dy(z=66)=4F106s2
Tb(z=65)=4F96s2
Ce(58)=4F15d16s2
Dy, Tb and Ce show +4 oxidation state while Eu do not show +4 oxidation state.

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