NEET2017Chemistryd and f Block ElementsActual
The reason for greater range of oxidation states in actinoids is attributed to
Options
- Athe radioactive nature of actinoids.
- Bactinoid contraction.
- C5 f ,   6 d   and   7 s levels having comparable energies.
- D4 f   and   5 d levels being close in energies.
Correct answer
C. 5 f ,   6 d   and   7 s levels having comparable energies.
Step-by-step solution
The minimum energy gap between 5 f ,   6 d   &   7 s subshell. That's why e − excitation will be easier.