if you were to say that you're using one mole of chlorine, this can be confusing because chlorine exists in two forms as an Adam or as what's called a die atomic molecule. The Adam is the symbol found on the periodic table, or C L. The diatonic molecule is C L two or two Koreans, and in most chemical reactions, C L two is used rather than C L. There are a total of seven elements that in nature exists is die atomic molecules. Hydrogen exist is H two nitrogen and to oxygen is 02 Floren. As we mentioned chlorine, Breault, main and iodine. These are examples of the elements that exist as die atomic molecules to avoid confusion. That's why you should use the formula rather than the word or the name of the element.