March 18th, 2019 
adminThe 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##
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