The common positive oxidation states for an element with atomic number $24$ are:

The most stable oxidation state of $Mn$ is

In the $3d$ series of $d-$block elements,which of the following elements has the maximum atomic size?

Arrange the following elements in the increasing order of the number of unpaired electrons in them.
$A$. $Sc$ $B$. $Cr$ $C$. $V$ $D$. $Ti$ $E$. $Mn$
Choose the correct answer from the options given below:

The correct order of ionic radii of trivalent ions $Y^{3+}$,$La^{3+}$,$Eu^{3+}$,and $Lu^{3+}$ is $(Y=39, La=57, Eu=63, Lu=71)$.

The correct decreasing order of spin only magnetic moment values $(BM)$ of $Cu^{+}$,$Cu^{2+}$,$Cr^{2+}$ and $Cr^{3+}$ ions is $:$