Question

Write the 4 quantum numbers of the third electron of a multi-electron atom.

Answer 1

For the third electron, the electronic configuration is,

`1S^22S^1`

which shows that,

1. The value of the principle quantum number is,

`n=2`

2. The value of the angular quantum number is,

`l=0`

3. The value of magnetic angular quantum number is,

`m_l=0`

4. The value of magnetic spin quantum number is,

`m_s=+(1)/(2)\text{ or -}(1)/(2)`

Thus, above four points represent the four quantum numbers of the third electron of multi-electron atom.