What is the electron configuration of nitrogen (N) ?

The of ##”N”## is ##”[He]”color(white)(l) 2s^2 2p^3##.
Nitrogen, ##”N”##, is located in Group 15, Row 2 of the .
It has ##7##.
This tells you that a neutral nitrogen atom has a total of ##7## electrons.
If you add electrons according to the Aufbau Principle, you get the electron configuration
##”N: ” 1s^2color(white)(l) 2s^2 2p^3##
If you use the , you will get from
##”N: ” overbrace(1s^2)^([“He”]) 2s^2 2p^3##
to
##”N: ” [“He”]color(white)(l) 2s^2 2p^3##