Question

What is the value of (n+l) for 10 electron in the phosphate?

Answer 1

Electronic configuration of phosphorous is

15 P=  1s², 2s² 2p⁶, 3s² 3p³

 since 10 th electron is in 2p orbital

so quantum no for 2p orbital is n =2 and l= 1

n+l =2+1 =3

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