Category: chemistry

The radii of 2nd second transition series and 3rd third transition series are very similar , why ?

This is because of the lanthanoid contraction as in case of 3rd transition series, the filling of f-subshell takes place. The screening effect of f-subshell is least . Due to this the effective nuclear charge experienced by 3rd transition series is quite high. The increase in size due to increase in shell numbers is overcame

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