Which of the following ions can be identified using a flame photometer?

Which of the following ions can be identified using a flame photometer?

Step 1: Understand what a flame photometer is. It is a device used to measure the intensity of light emitted by ions when they are heated in a flame.
Step 2: Know that different ions emit different colors of light when heated. This is called their emission spectrum.
Step 3: Identify the types of ions that can be measured. Flame photometry is mainly used for alkali metals (like sodium and potassium) and alkaline earth metals (like calcium and magnesium).
Step 4: Remember that each metal ion has a unique color of light it emits, which helps in identifying them.

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