Atomic number: 7, symbol: N Nitrogen is kind, playful and helps plants grow. Nitrogen is very tiny, not visible, 300 picometers across. She has 7 protons, 7 neutrons, 2 electrons orbiting her inner shell and 5 electrons oribiting her outer shell, 7 in total. Colorless, tasteless, odorless and diatomic. Many nitrogen altogether is generally an inert gas at standard temperature and pressure. At atmospheric pressure, nitrogen is liquid between 63 and 77 kelvin. Thank you nitrogen for all the food!