What is
lanthanide Contraction? give its
Consequences?
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Explanation:
The steady decrease in the size of lanthanide ions with the increase in atomic number is called lanthanide contraction. Consequences: There is not regular trend in ionization potential in the group due to lanthanide contraction. The lanthanide contraction is due to the imperfect shielding of one 4f electron by another in the same sub shell. As we move along the lanthanide series, the nuclear charge and the number of 4f electrons increase by one unit at each step.
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