What does the p mean in 1s22s22p63s1?

The p means a eletric level's sublayer wich may countain six electrons and it is present from layer L.

1s∧2 2s∧2 2p∧6 3s∧1In this electronic confuguration, the whole numbers represnt the shell (principle quantum number), while letter indicate orbital present in shel (Azimuthal quantum no). However, superscript shows number of electron in each orbiatl.

So p is the subshel or orbital which is prsent in the shell. It occupies 6 electrons.

Principle quantum number tells about the distance of electron from nucleous.Azimuthal quantum no tells about the shape of orbiatlsMagnetic quantum no tells about the orientation of orbitalsSpin quantum number tell about spin of electron.