👉 Cerithium is a chemical element with symbol Cr and atomic number 27. It is one of the seven known elements in the periodic table, along with iron (Fe), nickel (Ni), cobalt (Co), molybdenum (Mo), tungsten (W), chromium (Cr) and vanadium (V). Cerithium has a chemical symbol Cr, an atomic number 27, and its position on the periodic table is 10.