Inside this bottle is fluorine, the most reactive non-metal on Earth. Its extreme reactivity lets it steal hydrogen from water, igniting it and causing violent explosions. It’s so corrosive it can turn glass and ceramics into gas, and even Teflon can't resist it. Fluorine, element 9 in the periodic table, belongs to the halogen family. It's highly toxic, and its compound hydrogen fluoride is even more deadly. Fluorine reacts with nearly all elements. In experiments, it ignites charcoal instantly