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JEE Main2003Chemistryd and f Block ElementsActual

The radius of La ³⁺ (Atomic number of La =57 ) is 1.06 Å . Which one of the following given values will be closest to the radius of Lu ³⁺ (Atomic number of Lu =71 )?

Options

  1. A1.40 Å
  2. B1.06 Å
  3. C0.85 Å
  4. D1.60 Å

Correct answer

C. 0.85 Å

Step-by-step solution

1 Z ₁ ₂ = z₂ z₁ 1.06 ₂ = 71 57 ₂=0.85 Å

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