Short Answer Type
Long Answer Type|
Lanthanides |
Actinides |
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1. Lanthanides show +3 oxidation state only except in few cases where it is +2 or +4. Oxidation states exhibited by lanthanides is never more than +4. |
1. Actinides show higher oxidation states such as +4, +5, +6, +7 also in addition to +3. |
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2. Paramagnetic properties of lanthanides can be easily explained.
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2. Paramagnetic properties are difficult to interpret.
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3. Lanthanides do not form complexes.
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3. They have a greater tendency to complex formation. Even -complexes are formed by actinides.
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4. Lanthanide compounds are less basic.
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4. Compounds of these are sufficiently basic.
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5. Lanthanides do not form oxo ions.
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5. These in higher oxidation states form oxo ions. |
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6. Except promethium, these are ion-radio-active. |
6. Such as UO22+, NbO+, PuO,2+etc. |
Short Answer TypeAccount for the following facts:
The reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction.
Account for the following facts:
The reduction of Cr2O3 with Al is the thermo-dynamically feasible, yet it does not occur at room temperature.
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