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Class 8-9-10, JEE & NEET
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The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?
Due to poor f orbital shielding, effective nuclear charge increases and there is a contraction in the size of the third-row elements. This contraction in size is called
Lanthanide contraction. The second and third row of transition elements have similar atomic radii and therefore they resemble each other more.