Nitrogen, Periodic abbreviation= N Atomic Number: 7, as it has 7 protons Atomic Mass: 14.007, so around 7 protons and 7 neutrons depending on isotope type # Protons: 7 # Neutrons: 7 # Electrons: 7, usually, but not always, equal to # of Protons Valence Electrons: 5, as with 7 electrons total, 2 would fill the first valence shell, leaving 5 in the valence, or outermost, shell.