(B) In the $3d$ series,as we move from $Cr$ to $Cu$,the atomic number increases,which increases the nuclear charge. However,the electrons are added to

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Screening effect of $d$-electrons

(B) In the $3d$ series,as we move from $Cr$ to $Cu$,the atomic number increases,which increases the nuclear charge. However,the electrons are added to the inner $3d$ orbitals. These $3d$ electrons provide a poor shielding (screening) effect. As a result,the increase in nuclear charge is almost balanced by the screening effect of the $3d$ electrons,leading to a very negligible change in atomic volume.

Class 12 Chemistry d-and f-Block Elements General Characteristics

Easy

The decrease in atomic volume from $Cr$ to $Cu$ in the $3d$ series is very negligible because:

A
Increase in nuclear charge
B
Screening effect of $d$-electrons
C
Unpaired electrons of $Cr$
D
None of these

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d-and f-Block Elements

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General Characteristics

Four successive members of the first series of the transition metals are listed below. For which one of them is the standard electrode potential $(E^o_{M^{2+}/M})$ value positive?

MediumAIPMT 2012

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The atomic number of $Pd$ is $46$. The atomic numbers of the elements lying immediately above and below it in the same group are,respectively,.....................

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Explain the variations in atomic radii of transition elements along the period. The following table provides data for the first transition series:
Element Sc Ti $V$ Cr Mn Fe Co Ni Cu Zn
Metallic Radius $M$ (pm) $164$ $147$ $135$ $129$ $137$ $126$ $125$ $125$ $128$ $137$

Element	Sc	Ti	$V$	Cr	Mn	Fe	Co	Ni	Cu	Zn
Metallic Radius $M$ (pm)	$164$	$147$	$135$	$129$	$137$	$126$	$125$	$125$	$128$	$137$

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Which of the following electronic configurations of a transition metal atom shows the highest oxidation state?

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The metal commonly present in brass and german silver is

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The decrease in atomic volume from $Cr$ to $Cu$ in the $3d$ series is very negligible because:

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Four successive members of the first series of the transition metals are listed below. For which one of them is the standard electrode potential $(E^o_{M^{2+}/M})$ value positive?

The atomic number of $Pd$ is $46$. The atomic numbers of the elements lying immediately above and below it in the same group are,respectively,.....................

Explain the variations in atomic radii of transition elements along the period. The following table provides data for the first transition series:ElementScTi$V$CrMnFeCoNiCuZnMetallic Radius $M$ (pm)$164$$147$$135$$129$$137$$126$$125$$125$$128$$137$

Which of the following electronic configurations of a transition metal atom shows the highest oxidation state?

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Explain the variations in atomic radii of transition elements along the period. The following table provides data for the first transition series:
Element Sc Ti $V$ Cr Mn Fe Co Ni Cu Zn
Metallic Radius $M$ (pm) $164$ $147$ $135$ $129$ $137$ $126$ $125$ $125$ $128$ $137$