Which of the following ions has electronic configuration $[A r] d^{6}$ ?

L a^{3 +} (Z = 57)

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T i^{3 +} (Z = 22)

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C o^{3 +} (Z = 27)

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S c^{3 +} (Z = 21)

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Solution

The correct option is C $C o^{3 +} (Z = 27)$
Option C is correct
$[A r] d^{6}$ means total electron is 24
$C o$ atomic number $27$
$C o^{+ 3}$ has $27 - 3 = 24$ electrons

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Similar questions

[A r] 3 d^{6}

(A t o m i c N u m b e r : M n = 25, F e = 26, C o = 27, N i = 28)

\begin{matrix} Column - 1 & Column - 2 S p e c i e s & C h a r a c t e r i s t i c s (A) C o^{3 +} (Z = 27) & (p) Total number of fully filled orbitals is nine. (B) S c^{3 +} (z = 21) & (q) The value of magnetic moment (spin only) is greater than or equal to 3.87 BM. (C) C r^{3 +} (Z = 24) & (r) Number of electrons with n + l = 3 is eight. (D) N i^{2 +} (Z = 28) & (s) Number of electrons with (m = 0) may be either 11 or 12. (t) No unpaired electron. \end{matrix}

S c

=

S c^{3 +}, S c^{2 +}

S c^{+}

{C u}^{+}

(Z = 29)

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