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The d-And-f-Block Elements

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Chemistry I

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Chemistry

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

On the basis of incompletely filled 3d orbitals in case of scandium atom is its ground state (3d1), it is regarded as a transition element. On the other hand, zinc atom has completely filled dorbitals (3d10) in its ground state as well as in its oxidised state, hence it is not regarded as a transition elements.
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The outermost electronic configuration of Cr is ___________.


  3d54s1
,
 
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The d-block elements are also called _________.

transition elements
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The property of paramagnetism is due to the presence of _________ electrons.


unpaired

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The spin magnetic moment is given by the formula _____________.

μ = n(n+2) BM
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Colour exhibited by the transition element cations in the _________ of the absorbed wavelength.


complementary colour
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