The lanthanoid that does NOT show +4 oxidation state is:

Question:

The lanthanoid that does NOT show $+4$ oxidation state is:

  1. Dy

  2. Ce

  3. Eu

  4. Tb

Correct Option: , 3

Solution:

Europium(Eu)

Atomic No. $-63$

Electronic configuration - $[\mathrm{Xe}] 4 f^{7} 6 s^{2}$

It shows only $+2$ and $+3$ oxidation state.

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