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JEE Main202227 Jun 2022Evening ShiftChemistryd and f Block ElementsActual

The ' f ' orbitals are half and completely filled, respectively in lanthanide ions [Given : Atomic no. Eu , 63 : Sm , 62 : Tm , 69 ; Tb , 65 ; Yb , 70 ; Dy , 66 ]

Options

  1. AEu 2 + and Tm 2 +
  2. BSm 2 + and Tm 3 +
  3. CTb 4 + and Yb 2 +
  4. DDy 3 + and Yb 3 +

Correct answer

C. Tb 4 + and Yb 2 +

Step-by-step solution

Ion Electronic configuration Eu 2 + 4 f 7 Tm 2 + 4 f 13 Sm 2 + 4 f 6 Tm 3 + 4 f 12 Tb 4 + 4 f 7 Yb 2 + 4 f 14 Dy 3 + 4 f 9 Yb 3 + 4 f 13 Hence, the ions with half and completely filled configurations are Tb 4 +   and   Yb 2 +

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