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QJEEM22Chf4cd: JEE Main 2022 Chemistry - Class 12 JEEM22Chf4cd Solution: The 'f' orbitals are half and completely filled, respectively…

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]

Multiple Choice Options

  • A Eu2+ and Tm2+
  • B Sm2+ and Tm3+
  • C Tb4+ and Yb2+
  • D Dy3+ and Yb3+

Step-by-Step Verified Solution

Tb → 4f9 6s2

Tb+4 → 4f7

Yb → 4f14 6s2

Yb+2 → 4f14

Hence, the pair Tb+4 and Yb+2 have half filled and completely filled f subshells respectively.

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