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Explain how competition between two species leads to character displacement and ecological exclusion by giving an example.
Two competing species must differ in their respective ecological niche to inhabit a stable environment. Lack of differentiation between species will eliminate or exclude one of the species through competition....
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List the analytic and synthetic characters of a biological community. Explain in one or two lines the information provided by each character about the community. (10)
The analytical characters are those, which are directly observed in the field while the synthetic characters are based upon the data obtained for the analytical characters. The analytical characters are...
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<ul><li>List the analytic and synthetic character of biological community explain in one or two lines the information provided by each character about the community</li></ul>
The analytical characters are those, which are directly observed in the field while the synthetic characters are based upon the data obtained for the analytical characters. The analytical characters are...
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why the Lanthanides and Actinides moved to the bottom of the periodic table?
Lanthanide group is similar in chemical structure tothe lanthanum (the same with the actinides),in order that the table would have a compact form they were moved down from table. This...
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Decrease in hydration energy makes a compound __________.
electropositive
electronegative
insoluble
soluble
Decrease in hydration energy makes a compound insoluble.
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Even though actinides show similar variations in magnetic properties as that of
lanthanides, their magnetic properties are more complicated. Explain.
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...
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even though actinides show similar variations in magnetic properties as that of lanthanides, their magnetic properties are more complicated. explain.
Lanthanides are associated with the filling of 4f-orbitals while actinides are engaged with the filling of 5f-orbitals. The coupling energy of 4f-electrons is nearly not as much as that of...
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8. Some of the lanthanides and actinides besides showing + 3 oxidation state also show other
oxidation states. Which other factors may be responsible for this?
small size of 5f-orbitals;screening effect of f-orbitals by external electrons;the possibility of transition of electrons from 5f-orbitals to 6d;hybridization option.
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why molar magnetic susceptibility of actinides is lesser than lanthanides.
This is because electrons of actinides are less effectively shielded which results in quenching of the orbital contribution.
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Why 5d is less in energy than 4f in lanthanides?
Orbitals fill in order of energy. So 5D fills before 4F in some cases simply because the 5D energy levels are lower than the 4F levels for some. This does...
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