## Related questions with answers

Write the ground-state electron configurations of the following transition metal ions: (a) $\mathrm{Sc}^{3+}$, (b) $\mathrm{Ti}^{4+}$, (c) $\mathrm{V}^{5+}$, (d) $\mathrm{Cr}^{3+}$, (e) $\mathrm{Mn}^{2+}$, (f) $\mathrm{Fe}^{2+}$, (g) $\mathrm{Fe}^{3+}$, (h) $\mathrm{Co}^{2+}$, (i) $\mathrm{Ni}^{2+}$, (j) $\mathrm{Cu}^{+}$, (k) $\mathrm{Cu}^{2+}$, (l) $\mathrm{Ag}^{+}$, (m) $\mathrm{Au}^{+}$, (n) $\mathrm{Au}^{3+}$, (o) $\mathrm{Pt}^{2+}$.

Solution

Verifieda) $\mathrm{S c^{3+}} :1s^22s^2p^6 3 s^{2} 3 p^{6}$ - [Ar]

b) $\mathrm{T i^{4+}} : 1s^22s^2p^6 3 s^{2} 3 p^{6}$ - [Ar]

c) $\mathrm{V^{5+}} : 1s^22s^2p^6 3s^{2} 3 p^{6}$ - [Ar]

d) $\mathrm{C r^{3+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{3}$ - [Ar]$3d^3$

e) $\mathrm{M n^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{5}$ - [Ar]$3d^5$

f ) $\mathrm{F e^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{6}$ - [Ar]$3d^6$

g) $\mathrm{F e^{3+}} : 1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{5}$ - [Ar]$3d^5$

h) $\mathrm{C o^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{7}$ - [Ar]$3d^7$

i) $\mathrm{N i^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{8}$ - [Ar]$3d^8$

j) $\mathrm{C u^{+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{10}$ - [Ar]$3d^{10}$

k) $\mathrm{C u^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}3 d^{9}$ - [Ar]$3d^9$

l) $\mathrm{A g^{+}} :1s^22s^2p^6 3s^{2} 3 p^{6}4 s^{2} 3 d^{10}4p^64 d^{10}$ - [Kr]$4d^{10}$

m) $\mathrm{A u^{+}} :1s^22s^2p^6 3s^{2} 3 p^{6}4 s^{2} 3 d^{10}4p^64 d^{10}5s^25p^64 f^{14} 5 d^{10}$ - [Xe]$4f^{14}5d^{10}$

n) $\mathrm{A u^{3+}} : 1s^22s^2p^6 3s^{2} 3 p^{6}4 s^{2} 3 d^{10}4p^64 d^{10}5s^25p^6 4 f^{14} 5 d^{8}$ - [Xe]$4f^{14}5d^{8}$

o) $\mathrm{P t^{2+}} :1s^22s^2p^6 3s^{2} 3 p^{6}4 s^{2} 3 d^{10}4p^64 d^{10}5s^25p^64 f^{14} 5 d^{8}$ - [Xe]$4f^{14}5d^{8}$

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