The d-And-f-Block Elements

Short Answer Type

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Why Cr and Cu show exceptional configuration?

Changing in its normal configuration, Cr and Cu acquires half-filled and fully filled configurations which gives them extra stability. Hence they show exceptional configuration.
Cr → [Ar] 3d5 4s1 and Cu → [Ar] 3d10 4s1
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    Name the first element of 3rd transition series.

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    Why are transition elements so named?
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    Write the general electronic configuration of d-block elements.
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    Why do some exceptions to the general electronic configuration of d-block elements exists?
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    The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?

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    Why are transition elements known as d-block elements?
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    Why Zn, Cd and Hg are not regarded as transition elements?
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    Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

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    Why the melting points of transition elements are high?
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