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MHT CET202016 Oct 2020Evening ShiftChemistryd and f Block ElementsActual

Which of the following actinoids exhibits only +3 oxidation state

Options

  1. ALr ( z =103)
  2. BU(z=92)
  3. CTh(z=90)
  4. DPa(z=91)

Correct answer

A. Lr ( z =103)

Step-by-step solution

(B) Lr (Z=103)=[R n] 5 f⁴ 6 d¹ 7 s² Due to completely filled 5 f - orbital, Lr exhibits only +3 oxidation state.

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