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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?

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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?

There is a very less energy difference between (n – 1) d and ns orbitals because of which there exists exceptions to the general electronic configuration.

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20. Why Cr and Cu show exceptional configuration?

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