(પરમાણુ ક્રમાંક : $Ti = 22, Cr = 24, Co = 27, Zn = 30$)
\(\mathrm{Cr} \rightarrow[\mathrm{Ar}] 3 d^{4} 4 s^{2}, \mathrm{Cr}^{3+} \rightarrow[\mathrm{Ar}] 3 d^{3} 4 s^{0}\) \((3\) unpaired electrons)
\(\mathrm{Co} \rightarrow[\mathrm{Ar}] 3 d^{7} 4 s^{2}, \mathrm{Co}^{3+} \rightarrow[\mathrm{Ar}] 3 d^{6} 4 s^{0}\) \((0 \text { unpaired electrons because of pairing })\)
\(\mathrm{Zn} \rightarrow[\mathrm{Ar}] 3 d^{10} 4 s^{2}, \mathrm{Zn}^{2+} \rightarrow[\mathrm{Ar}] 3 d^{10}\) (no unpaired electrons)
\(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) exhibits highest paramagnetic behaviour as it contains \(3\) unpaired electrons.
સૂચિ-$I$ (સંકીર્ણ આયન) |
સૂચિ$II$ ($M.B.$માં સ્પીન ફક્ત ચુંબકીય ચાક્માત્રા) |
$A$ ${\left[\mathrm{Cr}\left(\mathrm{NH}_5\right)_0\right]^{3+}}$ | $I$ $4.90$ |
$B$ ${\left[\mathrm{NiCl}_4\right]^{2-}}$ | $II$ $3.87$ |
$C$ ${\left[\mathrm{CoF}_6\right]^{3-}}$ | $III$ $0.0$ |
$D$ ${\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}}$ | $IV$ $2.83$ |
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