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The reason for the greater range of oxidation states in actinoids is attributed to:
Option: 1
the radioactive nature of actinoids
Option: 2
actinoid contraction
Option: 3
5f, 6d and 7s levels having comparable energies
Option: 4
4f and 5d levels being close in energies
Answers (1)
The reason for the greater range of oxidation states in actinoids is attributed to 5f, 6d and 7s levels having comparable energies. Due to this outermost electrons are excited to higher energy levels giving variable oxidation states.
Hence, option number (3) is correct.
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