Question

Write down the electronic configuration of:
(i) $C{r}^{3+}$ (ii) $P{m}^{3+}$ (iii) $C{u}^{+}$ (iv) $C{e}^{4+}$ (v) $C{o}^2+$ (vi) $L{u}^{2+}$ (vii) $M{n}^{2+}$ (viii) $T{h}^{4+}$

Answer 1

The electronic configurations of various ions are as shown:

$C{r}^{3+}:\left[Ar\right]3d^3$
$P{m}^{3+}:\left[Xe\right]4f^4$
$C{u}^{+}:\left[Ar\right]3d^{10}$
$C{e}^{4+}:\left[Xe\right]$
$C{o}^{2+}:\left[Ar\right]3d^7$
$L{u}^{2+}:\left[Xe\right]4f^{14}5d^1$
$M{n}^{2+}:\left[Ar\right]3d^5$
$T{h}^{4+}:\left[Rn\right]$