Nickel is a Block D, Group 4, Period 4 element. The electronic configuration is [Ar]3d84s2. In its elemental form nickel's CAS number is 7440-02-0. The nickel atom has a radius of 149.pm and it's Van der Waals radius is 163.pm. It is extensively alloyed with iron, chromium, molybdenum, tungsten and other metals produce stainless and other anti-corrosive steel and other corrosion-resistant alloys. It is highly electronically conductive and has many applications as a result. It is the basis of the nickel hydride battery. Most recently, its conductive properties have made it an ideal component for ceramic anode formulations used in oxygen generation and solid oxide fuel cell applications. Catalytic nickel is used to hydrogenate vegetable oils. Nickel additions to glass and ceramic glazes impart a bright green. It is also used in pigments for this purpose.