The D And F Block Elements Ques 69
69. The reason for greater range of oxidation states in actinoids is attributed to :-
[2017]
(a) actinoid contraction
(b) $5 f, 6 d$ and $7 s$ levels having comparable energies
(c) $4 f$ and $5 d$ levels being close in energies
(d) the redioactive nature of actinoids
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Solution:
- (b) Minimum or comparable energy gap between $5 f, 6 d$ and $7 s$ subshell makes electron excitation easier, hence there is a greater range of oxidation states in actinoids.
BETA
