Other Name(s): Atomic number 28, Chlorure de Nickel, Ni, Nickel Chloride, Nickel Sulfate, Nickelous Sulfate, Nquel, Numro Atomique 28, Oligo-lment, Sulfate de Nickel, Sulfate Nickeleux, Trace Element.

Nickel minerals were green, like copper ores, and were known as kupfernickel  Nickel's copper  because they produced no copper.