Yes, the color of a metallic ion can change depending on the compound it is part of. The color of a compound is determined by the specific arrangement and bonding of atoms in the compound, and different compounds can have different arrangements and bonding. The presence of different anions like chloride, nitrate, or sulfate can affect the electronic structure of the metal ion, leading to changes in its color. For example, copper chloride is green, copper nitrate is blue, and copper sulfate is blue/green. These color changes can be attributed to changes in the energy levels and electronic transitions of the metal ion.
