Which one of the following ions has an electronic configuration of $[A r] 3 d^{10}$ ?

N i^{2 +}

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M n^{2 +}

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F e^{2 +}

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Z n^{2 +}

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Solution

The correct option is D $Z n^{2 +}$
Electronic configurations of elements as per the Aufbau Principle:
Atomic number of Ni = 28
$N i^{2 +} = [A r] 3 d^{8}$
Atomic number of Mn = 25
$M n^{2 +} = [A r] 3 d^{5}$
Atomic number of Fe = 26
$F e^{2 +} = [A r] 3 d^{6}$
Atpmic number of Zn = 30
$Z n^{2 +} = [A r] 3 d^{10}$
$Z n^{2 +}$ will have the required electronic configuration

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Similar questions

Q. Which one of the following ions has an electronic configuration of

[A r] 3 d^{10}

The $d$ electron configuration of $C r^{2 +}, M n^{2 +}, F e^{2 +}$ and $N i^{2 +}$ are $3 d^{4}, 3 d^{5}, 3 d^{6}$ and $3 d^{8}$ respectively. Which one of the following aqua complexes will exhibit the maximum paramagnetic behaviour?

Magnetic moment of which ion is 2.88 BM ?

Q. The

d -

electronic configuration of

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

and

N i^{2 +}

are

3 d^{4}, 3 d^{5}, 3 d^{6}

and

3 d^{8}

respectively, which one of the following aqua-complex will exhibit the minimum paramagnetic behaviour?

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Multi-Electron Configurations and Orbital Diagrams

Standard XII Chemistry

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Which one of the following ions has an electronic configuration of [Ar]3d10 ?

Which one of the following ions has an electronic configuration of $[A r] 3 d^{10}$ ?