The molecular formula specifies the number of atoms of each element in one molecule. For iso-octane this is C8H18. This means that there are 8 atoms of carbon and 18 atoms of hydrogen in one molecule of C8H18. This also means that in one mole of iso-octane, there are 8 moles of carbon and 18 moles of hydrogen.
As shown in Table 2, the average iodine adsorption number per gram of the carbon black of the set of E2-1ËE2-5 is 124.8 mg as compared to 126 mg per gram of the carbon black sample determined by the titration method according to the standard of ASTM-D1510.
growth and metabolic function. Its chemical symbol is I and its atomic number of 53 on the Periodic Table of Elements. Elemental iodine is two iodine atoms bonded together. Iodide is the ion state of iodine, occurring when iodine bonds with another element, such as potassium. In this form,iodine can be ingested or applied topically (such as with povidone iodine, an iodide). So iodine and iodide are simply different expressions of the same element.