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D and F Block Elements question

2017 · Q98
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D and F Block Elements question

2017 · Q98

NEETChemistryD and F Block ElementsMCQ+4 / −1
The reason for greater range of oxidation states in actinoids is attributed to
  1. A
    actinoid contraction
  2. B
    5fff, 6d and 7s levels having comparable energies
  3. C
    4fff and 5d levels being close in energies
  4. D
    the radioactive nature of actinoids.
View written solutionFree

Correct answer: B

Minimum or comparable energy gap between 5f, 6d and 7s subshell makes electron excitation easier, hence there is a greater range of oxidation states in actinoids.

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