(B) The first transition series corresponds to the filling of the $3d$ orbitals. This series starts from Scandium $(Z = 21)$ and ends at Zinc $(Z = 30

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(B) The first transition series corresponds to the filling of the $3d$ orbitals. This series starts from Scandium $(Z = 21)$ and ends at Zinc $(Z = 30)$. These elements belong to the $4^{th}$ period of the periodic table.

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

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In the periodic table,the first transition series is placed in:

A
Third period
B
Fourth period
C
Fifth period
D
None of these

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Class 12

Chemistry Questions

Chapter

d-and f-Block Elements

Subtopic

General Characteristics

The calculated spin-only magnetic moment of $Cr^{2+}$ ion is......$B.M.$

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Match the column-$I$ with column-$II$.

column-$I$ $(\text{Property})$ column-$II$ $(\text{Metal})$

$i$. An element which can show $+8$ oxidation state $a$. $Mn$

$ii$. $3d$ series element that can show upto $+7$ oxidation state $b$. $Cr$

$iii$. $3d$ series element with highest melting point $c$. $Os$

column-$I$ $(\text{Property})$	column-$II$ $(\text{Metal})$
$i$. An element which can show $+8$ oxidation state	$a$. $Mn$
$ii$. $3d$ series element that can show upto $+7$ oxidation state	$b$. $Cr$
$iii$. $3d$ series element with highest melting point	$c$. $Os$