S. No. |
Outer configu-ration |
No. of unpaired \(e^-\) |
Colour of ion |
Magnetic moment |
\({V^{ + 3}}\) |
\(3{d^2}\) |
\(2\) |
Green |
\(2.76\) |
\(M{n^{ + 3}}\) |
\(3{d^4}\) |
\(4\) |
Violet |
\(1.9\) |
\(F{e^{ + 3}}\) |
\(3{d^5}\) |
\(5\) |
Yellow |
\(5.96\) |
\(C{u^{ + 2}}\) |
\(3{d^9}\) |
\(1\) |
Blue |
\(1.9\) |
(પરમાણ્વિય ક્રમાંક : $\mathrm{Xe}=54, \mathrm{Ce}=58, \mathrm{Eu}=63$ )