Q76 / 180 · NEET 2017 · Chemistry

The reason for greater range of oxidation states in actinoids is attributed to

A
the radioactive nature of actinoids.
B
actinoid contraction.
Correct answer
C
$5 f, 6 d and 7 s$ levels having comparable energies.
D
$4 f and 5 d$ levels being close in energies.

Solution

The minimum energy gap between

5 f, 6 d & 7 s

subshell. That's why

e^{-}

excitation will be easier.

Hence, the correct answer is option: 'C'.

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