Nickel Periodic Table Nickel Ore, Properties, Uses, Distribution Map Ni Nickel, Periodic Table of the Elements, Shell Structure of Nickel Facts About Nickel Live Science Icon structure Nickel (Ni) chemical element round shape circle black. Substantial Cast aluminum bells feature a pair of metal spheres as clappers, and strung on a wire cord. A dome shaped bell of sand cast aluminum, paired with a triangular, polished oak sail oiled for weatherproofing. Choose from the nickel or antique brass finishes.