(C) The atomic number of $Fe$ is $26$. The electronic configuration of $Fe$ is $[Ar] 3d^6 4s^2$. When $Fe$ forms an $Fe^{2+}$ ion,it loses two electro

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(C) The atomic number of $Fe$ is $26$. The electronic configuration of $Fe$ is $[Ar] 3d^6 4s^2$. When $Fe$ forms an $Fe^{2+}$ ion,it loses two electrons from the $4s$ orbital. The electronic configuration of $Fe^{2+}$ becomes $[Ar] 3d^6 4s^0$. Therefore,the number of $d$-electrons present in $Fe^{2+}$ is $6$.

Class 11 Chemistry Structure of Atom Quantum number, Electronic configuration and Shape of orbitals

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What is the number of $d$-electrons present in $Fe^{2+}$ ($Fe$ atomic number = $26$)?

A
$4$
B
$5$
C
$6$
D
$3$

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Structure of Atom

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Quantum number, Electronic configuration and Shape of orbitals

In an atom,the order of increasing energy of electrons with quantum numbers $(i)$ $n=4, l=1$,(ii) $n=4, l=0$,(iii) $n=3, l=2$,and (iv) $n=3, l=1$ is:

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Which of the following species has an equal number of electrons in the outermost shell and the penultimate shell?

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The orbital having $3$ angular nodes and $3$ total nodes is:

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The correct set of quantum numbers for the unpaired electron of a chlorine atom is:

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$Fe$ (atomic number $= 26$) atom has the electronic arrangement:

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What is the number of $d$-electrons present in $Fe^{2+}$ ($Fe$ atomic number = $26$)?

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In an atom,the order of increasing energy of electrons with quantum numbers $(i)$ $n=4, l=1$,(ii) $n=4, l=0$,(iii) $n=3, l=2$,and (iv) $n=3, l=1$ is:

Which of the following species has an equal number of electrons in the outermost shell and the penultimate shell?

The orbital having $3$ angular nodes and $3$ total nodes is:

The correct set of quantum numbers for the unpaired electron of a chlorine atom is:

$Fe$ (atomic number $= 26$) atom has the electronic arrangement:

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