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NEET2012Chemistryd and f Block ElementsActual

Which of the following exhibits only +3 oxidation state?

Options

  1. AU
  2. BTh
  3. CAc
  4. DPa

Correct answer

C. Ac

Step-by-step solution

₈₉ Ac =[ Rn ] 6 d^1, 7 s^2 Oxidation state =+3 ₉₀ Th =[ Rn ] 6 d^2, 7 s^2 Oxidation states =+3,+4 ₉₁ ~Pa =[ Rn ] 6 d^3, 7 s^2 Oxidation states =+3,+4,+5 ₉₂ U =[ Rn ] 6 d^4, 7 s^2 Oxidation states =+3,+4,+5,+6

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