Compare and contrast lanthanides and actinides
Answers
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Differences :
Lanthanoids are involved in the filling of 4f- orbitals whereas actinoids are involved in the filling of 5f-orbitals. The binding energy of 4f electrons is comparatively less than that of 5f-electrons. The shielding effect of 5f-electrons is less effective as compared to that of 4f-electrons. The paramagnetic properties of lanthanoids can be easily explained but this explanation is difficult in case of actinoids. Lanthanides are non-radioactive in nature except promethium whereas all actinide series elements are radioactive. Lanthanides do not have a tendency to form oxocations, but several oxocations of actinide series exist. The compounds formed by lanthanides are less basic on the other hand the compounds of actinides are highly basic.
Similarities :
The elements of lanthanide and actinide series are characterized by filling of (n-2) f subshell. They possess almost similar outermost electronic configuration hence have similar properties. Following are the significant similarities:
Both have a prominent oxidation state of +3.They are involved in the filling of (n-2) f orbitals.They are highly electropositive and very reactive in nature.With an increase in atomic number, there is a decrease in atomic and ionic size.Both show magnetic properties.Hope this helps you
Answer:
Explanation:
Differences :
Lanthanoids are involved in the filling of 4f- orbitals whereas actinoids are involved in the filling of 5f-orbitals. The binding energy of 4f electrons is comparatively less than that of 5f-electrons. The shielding effect of 5f-electrons is less effective as compared to that of 4f-electrons. The paramagnetic properties of lanthanoids can be easily explained but this explanation is difficult in case of actinoids. Lanthanides are non-radioactive in nature except promethium whereas all actinide series elements are radioactive. Lanthanides do not have a tendency to form oxocations, but several oxocations of actinide series exist. The compounds formed by lanthanides are less basic on the other hand the compounds of actinides are highly basic.
Similarities :
The elements of lanthanide and actinide series are characterized by filling of (n-2) f subshell. They possess almost similar outermost electronic configuration hence have similar properties. Following are the significant similarities:
Both have a prominent oxidation state of +3.They are involved in the filling of (n-2) f orbitals.They are highly electropositive and very reactive in nature.With an increase in atomic number, there is a decrease in atomic and ionic size.Both show magnetic properties.