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Which of the d-block elements are not re...

Which of the d-block elements are not referred to as the transition elements ?

A

Group 9

B

Group 12

C

Group 10

D

Group 13

Text Solution

Verified by Experts

The correct Answer is:
B
Transition elements are those d-block elements which have incompletely filled (n-1) d subshells either in their atomic state or in their common ionic states. On the basis of incompletely filled 3d subshell in case of scandium atom in its ground state `(3d^(1) 4s^(2))`, it is regarded as a transition element. On the other hand, Zinc atom (Group. 12) has completely filled 3d subshell `(3d^(10))` in its atomic state as well as in its + 2 state hence it is not regarded as a transition element. Silver atom has completely field (n-1) d subshell in the ground state of its atom `(4d^(10) 5s^(1))`, but it is a transition element because it shows oxidation state of `+ 1(4d^(10))`, `+ 2(4d^(9))` and `+3(4d^(8))`.
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What are the characteristics of th transition elements and why are they called transition elements? Which of the d-block elements may not be regarded as the transition elements?

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Knowledge Check

  • Which of the following are d-block elements but NOT regarded as true transition elements?

    A
    Cu, Ag, Au
    B
    Zn, Cd, Hg
    C
    Fe, Co, Ni
    D
    Ru, Rh, Pd

  • Which of the d-block elements has the lowest electronegativity ?

    A
    Co
    B
    Ni
    C
    Cu
    D
    Zn

  • Identify d-block element ?

    A
    `[Xe]4f^(14)5d^(1)6s^2`
    B
    `[Rs]5f^(14)6d^(1)7s^2`
    C
    `[Xe]4f^(14)5d^(10)6s^2`
    D
    `[Rs]6d^2 7s^2`

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