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How are the quantum numbers n , 1 m(1) ...

How are the quantum numbers n , 1 `m_(1)` for hydrogen atom are obtained ?

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Electronic configuration of hydrogen is `1s^(1)` For `ns^(1)`
Principal quantum. no. (n) = 1
Azimuthal quantum no. (l) = 0
Magnetic quantum no. `(m_(l))` = 0
and Spin quantum no. `(m_(s))=+1//2`
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