Which of the following pairs of ions have the same electronic configuration?

C u^{2 +}, C r^{2 +}

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F e^{3 +}, M n^{2 +}

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C o^{3 +}, N i^{3 +}

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S c^{3 +}, C r^{3 +}

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Solution

The correct option is B $F e^{3 +}, M n^{2 +}$
Electronic configuration of ${F e}^{+ 3}$ is $[A r] 3 d^{3}$
and of ${M n}^{+ 2}$ is $[A r] 3 d^{3}$

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Similar questions

Question 14

The pair of ions having same electronic configuration is.............

(a) $C r^{3 +}, F e^{3 +}$ (b) $F e^{3 +}, M n^{2 +} +$ (c) $F e^{3 +}, C o^{3 +}$ (d) $S C^{3 +}, C r^{3 +}$

[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)

F e^{2 +}, F e^{3 +}, C r^{2 +}, C r^{3 +}, M n^{2 +}, M n^{3 +}

F e^{2 +}, F e^{3 +}, C r^{2 +}, C r^{3 +}, M n^{2 +}, M n^{3 +}

V^{2 +} < C r^{2 +} < M n^{2} < F e^{2 +}

N i^{2 +} < C o^{2 +} < F e^{2 +} < M n^{2 +}

C o^{3 +} < F e^{3 +} < C r^{3 +} < S c^{3 +}

S c < T i < C r < M n

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