Selling 50 gallons. Very dangerous, you will need to be careful with it and you will have to come and pick it up. The atomic number is 7, that is also the amount of the protons, electrons, and neutrons. The atomic weight is 14.007. The melting point is 63.15 K. The boiling point is 77.355 K. It is commonly used for making light bulbs, filling race car and aircraft tires, and the making of stainless steel.