Larger number of oxidation states are exhibited by the
actinoids than those by the lanthanoids, the main reason
being
(a) 4f orbitals more diffused than the 5f orbitals
(b) lesser energy difference between 5f and 6d than
between 4f and 5d orbitals
(c) more energy difference between 5f and 6d than between
4f and 5d orbitals
(d) more reactive nature of the actionids than the
lanthanoids
Answers
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Larger number of oxidation states are exhibited by the
actinoids than those by the lanthanoids and the main reason behind this is
1) lesser energy difference between 5f and 6d than between 4f and 5d.
2) since they have comparable energy level so all these subshells participate (5f, 6d ,7s)
3) also they have less screening effect
Answered by
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Lesser energy difference between 5f and 6d than between 4f and 5d orbitals is the reason.
Explanation:
- Lanthanoids are the elements with electrons in 4f, 5d and 6s orbitals.
- While, actinoids are the elements with electrons in 5f, 6d and 7s orbitals.
- The energy difference between the 4f orbitals and the 5d and 6s orbitals are quite high.
- So the electrons that are in 4f orbitals cannot jump to those orbitals to exhibit different oxidation levels.
- Whereas the energy difference between the 5f orbitals and 6d and 7s orbitals are not that high.
- This leads to jumping of the electrons from the 5f to 6d and 7s orbitals thereby exhibiting a huge number of oxidation state.
- The oxidation state of lanthanoids are mainly +2 and +3.
- While oxidation state of actinoids are varying from +2 to +7.
- Screening effect also plays an important role.
For more information about lanthanoids and actinoids oxidation state,
https://brainly.in/question/2693528
Similarities between Lanthanoids and Actinoids? - Brainly.in
https://brainly.in/question/5246750
Write any four differences between lanthanoids and actinoids.
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