The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?
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1
1️⃣It is because in the beginning , when 5f.
2️⃣Orbitals begin to be occupied they will penetrate less than the inner core of electron .
3️⃣The 5-f electron will therefore be more effectively shielded from the nuclear charge than 4f- electrons of the corresponding lanthanoids.
4️⃣Therefore outer electrons are less friendly held and they are available for bonding in the actinoids.
2️⃣Orbitals begin to be occupied they will penetrate less than the inner core of electron .
3️⃣The 5-f electron will therefore be more effectively shielded from the nuclear charge than 4f- electrons of the corresponding lanthanoids.
4️⃣Therefore outer electrons are less friendly held and they are available for bonding in the actinoids.
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3
Hey !!
Due to Lanthanoid contraction, the atomic radii of the second and third row transition elements is almost same. So they resemble each other much more as compared to first row elements.
Good luck !!
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