The Chemistry of Art > 2. The Structure of the Atom and Colours > Identification by Flame Colour >
Identify Na+, K+, Ca2+, Ba2+, Sr2+, and Cu2+ cations by their flame colour
- Some of the elements exhibit distinct color upon ignition are shown below:
| Cation | Flame Colour |
| Sr2+ | Red |
| Ca2+ | Orange – Red |
| Na+ | Orange – Yellow |
| Ba2+ | Green (Apple Green) |
| Cu2+ | Blue – Green |
| K+ | Violet |