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The second and third rows of transition ...

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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To explain why the second and third rows of transition elements resemble each other much more than they resemble the first row, we can follow these steps: ### Step 1: Identify the Transition Element Series The transition elements are divided into three series based on their electron configurations: - The first row (3D series) includes elements from Scandium (Sc) to Zinc (Zn). - The second row (4D series) includes elements from Yttrium (Y) to Cadmium (Cd). - The third row (5D series) includes elements from Lanthanum (La) to Mercury (Hg). ...
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Knowledge Check

  • The second and third row elements of transition maetals resemle each other much more than they resemble the first row because of

    A
    lanthanoid contraction which results in almost same radii of second and third row metals
    B
    diagonal relationship between second and third row elements
    C
    similar ionisation elethalphy of second and third row elements
    D
    similar oxidation states of second and third row metals.

  • Sizes of the seond and third row transition elements are almost the same because of

    A
    `d`-orbital contraction
    B
    lanthanide contraction
    C
    actinide contraction
    D
    both `(2)`and `(3)`

  • The sizes of the second and third row transition elements being almost the same . This is due to :

    A
    d- and f-orbitals do not shield the nuclear charge very effectively
    B
    Lanthanide contraction
    C
    Both are true
    D
    None

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