The costs per ton mile were computed by dividing the 2002 data for the total costs of shipping freight in each of the four modes by the total ton miles shipped for each of the four modes. The total costs for shipping freight in 2002 are provided in a Department of Transportation study. Click here to go to this study.
Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. diagonal relationship exists between the behavior of magnesium and scandium, just as there is between beryllium and aluminium. In the chemical compounds of the elements in group 3, the predominant oxidation state is +3.
Rhodium is a noble metal, resistant to corrosion, found in platinum-or nickel ores together with the other members of the platinum group metals.he industrial extraction of rhodium is complex, as the metal occurs in ores mixed with other metals such as palladium, silver, platinum, and gold. It is found in platinum ores and extracted as a white inert metal which is very difficult to fuse.