State the reason for the stability of the $Gd^{3+}$ ion.
- A$4f$ orbital is completely filled.
- B$4f$ orbital is half-filled.
- CIt has a noble gas electron configuration.
- D$4f$ orbital is completely empty.
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Similar Questions
Consider the following pairs of elements and identify the pairs of elements which have nearly same atomic radius.
$I$. $Y, La$
$II$. $Zr, Hf$
$III$. $Mo, W$
$IV$. $Cr, Mo$
$I$. $Y, La$
$II$. $Zr, Hf$
$III$. $Mo, W$
$IV$. $Cr, Mo$
Given below are two statements $:$
Statement $I : CrO_3$ is a stronger oxidizing agent than $MoO_3$
Statement $II : Cr(VI)$ is more stable than $Mo(VI)$
In the light of the above statements,choose the correct answer from the options given below.
Statement $I : CrO_3$ is a stronger oxidizing agent than $MoO_3$
Statement $II : Cr(VI)$ is more stable than $Mo(VI)$
In the light of the above statements,choose the correct answer from the options given below.
The electronic configuration of $Pt$ (atomic number $78$) is $...$
Which one of the following is not a transition metal?
Easy
View SolutionOut of all the known elements,the percentage of transition elements is approximately $......\%$
Difficult
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