The first quantum number of 2s2 electron in phosphorus will be 2 which is principle quantum number.
Quantum numbers are just a sequence of numbers that represent the location and momentum of a particular atom or ion.
Calculation of quantum number.
It is given that, 2s2.
Here, 2 will be the principle quantum number.
Therefore, the first quantum number of 2s2 electron in phosphorus will be 2 which is principle quantum number.
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