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The d-And-f-Block Elements

Short Answer Type

11.

The outer electronic configuration of copper is 3d¹⁰ 4s¹, yet it is considered transition element. Why?

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12. Why the melting points of transition elements are high?

The melting points of transition elements are high due to the presence of strong intermetallic bonds (formed by valence electrons) and covalent bonds (formed due to d-d overlapping of unpaired d-electrons).

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13. Why Zn, Cd and Hg are not regarded as transition elements?

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14.

Name the first element of 3rd transition series.

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15.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

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16. Why are transition elements so named?

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17. Why are transition elements known as d-block elements?

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18. Write the general electronic configuration of d-block elements.

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19. Why do some exceptions to the general electronic configuration of d-block elements exists?

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20. Why Cr and Cu show exceptional configuration?

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