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प्रश्न
Why Zn, Cd and Hg are not called transition metals?
Account for the following:
Zn, Cd and Hg are not called transition elements.
Explain giving reason:
Zn, Cd and Hg are not regarded as transition elements.
Why are Zn, Cd and Hg not regarded as transition elements?
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उत्तर १
The orbitals of elements such as Zn, Cd and Hg are totally occupied when they are in their ground state as well as their general oxidation state. As a result, these elements are not considered transition elements.
उत्तर २
- Zn, Cd, and Hg have completely filled d-orbitals in their atoms and common ions (Zn2+, Cd2+, Hg2+).
- Their electronic configurations show no partly filled d-orbitals.
- Transition elements are defined as d-block elements having partly filled d-orbitals in their atoms or common ions.
- Since Zn, Cd, and Hg lack partly filled d-orbitals, they do not meet the definition of transition elements.
- Hence, Zn, Cd, and Hg are not regarded as transition elements.
Notes
Students can refer to the provided solutions based on their preferred marks.
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संबंधित प्रश्न
|
`E_((M^(2+)/M)` |
Cr | Mn | Fe | Co | Ni | Cu |
| -0.91 | -1.18 | -0.44 | -0.28 | -0.25 | -0.34 |
From the given data of E0 values, answer the following questions :
(1) Why is `E_(((Cu^(2+))/(Cu)))` value exceptionally positive
(2) Why is `E_(((Mn^(2+))/(Mn)))` value is highly negative as compared to other elements
(3) Which is the stronger reducing agents Cr2+ or Fe2+ ? Give Reason.
In what way is the electronic configuration of the transition elements different from that of the non-transition elements?
How would you account for the following:
The d1 configuration is very unstable in ions.
Give reasons:
E° value for the Mn3+/Mn2+ couple is much more positive than that for Fe3+/Fe2+.
Why do transition elements show variable oxidation states ? In 3d series (Sc to Zn), which elements shows the maximum number of oxidation state and why ?
Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?
The element with atomic number 46 belongs to
Which of the following statements is not correct?
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Oxidation states
