Yes nitrogen is a diatomic. All the diatomic atoms in the periodic table are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine and astatide.+ 2 others found this useful.es nitrogen is a diatomic. All the diatomic atoms in the periodic table are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine and astatide. + 2 others found this useful.