Calculate the number of unpaired electrons in the following gaseous ions: $Mn ^{3+}, Cr ^{3+}, V ^{3+}$ and $T i^{3+} .$ Which one of these is the most stable in aqueous solution?
Which of the following is correct
Magnetic moment $2.83\, BM$ is given by which of the following ions ?
(At. nos. $Ti = 22,\,Cr = 24,$ $ Mn = 25,\,Ni = 28$)
$F{e^{2 + }}$ shows