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Copper atom has completely filled d-orbi...

Copper atom has completely filled d-orbitals in its ground state but it is a transition element. Why ?

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Copper exhibits +2 oxidation state wherein it has incompletely filled d-orbitals `(3d^(9)4s^(0))`. Hence it is a transition element.
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(i) Give the general electronic configuration of d-block elements, (ii) Silver atom has completely filled d-orbitals (4d^10) in its ground state. Yet, it is considered as transition element. Why? (iii) Cu^+ ion is not stable in aqueous solution. Explain. (iv) Actinoids contraction is greater from element to element than lanthanoid contraction. Why?

Copper atom has completely filled d orbitals (3d^(10)) in its ground state. How can we say that it is a transition element

Silver atom has completely filled d orbitals (4d^(10)) in its ground state. How can you say it is a transition element?

Explain the following observations : (i) Copper atom has completely field d orbitals (3d^(10)) in its ground state, it is regarded as a transition element. (ii) Cr^(2+) is a stronger reducing agent than Fe^(2+) in aqueous solutions.

(a) Silver atom has completely filled 'd' orbitals (4d^10) in its ground state. How can you say that it is a transition element ? (b) Actinoids exhibit a large number of oxidation states in comparison to corresponding members of Lanthanoid series. Why?

U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS (1 mark each)
  1. Write the formula of an oxo-anion of chromium (Cr) in which it shows t...

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  2. Why is zinc not regarded as a transition element ?

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  3. Copper atom has completely filled d-orbitals in its ground state but i...

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  4. Why first ionisation enthalpy of Cr is lower than that of Zn ?

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  5. What is meant by lanthanoid contraction ?

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  6. Why does copper not replace hydrogen from acids ?

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  7. Why is Bi(V) a stronger oxidant than Sb(V) ?

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  8. Write the outer electronic configuration of Cr atom (Z = 24).

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  9. The electronic configuration of a transition element in +3 oxidation s...

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  10. Which is more basic La(OH)(3) or Lu(OH)(3) ? Why ?

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  11. How is the magnetic moment of a species related to the number of unpai...

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  12. Which property of the transition elements makes them good catalysts ?

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  13. What is the effect of increasing pH on K(2)Cr(2)O(7) solution ?

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  14. Why is third ionisation energy of manganese [Atomic number = 25] unexp...

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  15. Why is electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d...

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  16. Name the lanthanoid element which exhibits a +4 oxidation state beside...

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  17. What is the difference between the electronic configurations of lantha...

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  18. State a consequence of lanthanoid contraction shown by transition elem...

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  19. Why is that orange solution of K(2)Cr(2)O(7) turns yellow on adding N...

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  20. Why do most transition metal ions show variable oxidation states ?

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