(C) The electronic configuration of an element with the outermost orbital $4s^2$ implies that the $3d$ subshell is completely filled. Following the Au

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(C) The electronic configuration of an element with the outermost orbital $4s^2$ implies that the $3d$ subshell is completely filled. Following the Aufbau principle,the complete electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2$. Summing the electrons: $2 + 2 + 6 + 2 + 6 + 10 + 2 = 30$. Therefore,the atomic number is $30$,which corresponds to Zinc $(Zn)$.

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

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An element has an outermost orbital configuration of $4s^2$. What is its atomic number?

A
$29$
B
$24$
C
$30$
D
$19$

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Structure of Atom

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Quantum number, Electronic configuration and Shape of orbitals

The atomic number of an element having the valence shell electronic configuration $4s^2 4p^6$ is

Medium

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The explanation for the presence of three unpaired electrons in the nitrogen atom can be given by

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After filling the $4d$ orbitals,an electron will enter in:

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Assertion : Spin quantum number can have two values,$+\frac{1}{2}$ and $-\frac{1}{2}$.
Reason : $+$ and $-$ signs signify the positive and negative wave functions.

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The value of the azimuthal quantum number for electrons present in the $4p$ orbital is:

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An element has an outermost orbital configuration of $4s^2$. What is its atomic number?

Similar Questions

The atomic number of an element having the valence shell electronic configuration $4s^2 4p^6$ is

The explanation for the presence of three unpaired electrons in the nitrogen atom can be given by

After filling the $4d$ orbitals,an electron will enter in:

Assertion : Spin quantum number can have two values,$+\frac{1}{2}$ and $-\frac{1}{2}$.Reason : $+$ and $-$ signs signify the positive and negative wave functions.

The value of the azimuthal quantum number for electrons present in the $4p$ orbital is:

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Assertion : Spin quantum number can have two values,$+\frac{1}{2}$ and $-\frac{1}{2}$.
Reason : $+$ and $-$ signs signify the positive and negative wave functions.