The Flame Test identifies metal ions based on the characteristic light emitted when their electrons return to lower energy levels after being excited in a flame.

• Calcium ($C{a}^{2+}$): Gives a characteristic Brick-red flame.
• Comparison:
• Sodium ($N{a}^{+}$): Golden yellow.
• Potassium ($K^{+}$): Lilac (Pale violet).
• Barium ($B{a}^{2+}$): Apple-green.
• Strontium ($S{r}^{2+}$): Crimson-red.
• Small amounts of concentrated $HCl$ are used to convert the salt into volatile chlorides for better results.