An atom has two electrons in its 4s orbital. Write the values of the four quantum numbers for each of them.

Monjur Alahi

An atom has two electrons in its 4s orbital. Write the values of the four quantum numbers for each of them.


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Salim Ahmed Kawsar

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For the 4s orbital, 

4 stands for the principal quantum number n; s stands for the subshell s having the value of azimuthal quantum number, l = 0. 

In the ‘s’ subshell, there is only one orbital and has magnetic quantum number, ml = 0. 

The two electrons in this orbital have opposite spins. 

Thus, 

The four quantum numbers of two electrons in 4s orbital are :

n l ml ms
Electron 1 4 0 0 +1/2
Electron 2 4 0 0 -1/2
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