Explain how flame emission spectroscopy can be used to identify metal ions.

A high-scoring answer should explain compare instrumental methods with chemical tests in terms of speed, sensitivity and sample size. Use evidence before identification: name the relevant test or measurement, state the observation, and then connect the result to Instrumental methods.

The important distinction is that chemical analysis must be identified from test observation; answers that swap in a different test or result do not match Instrumental methods. A complete answer should use the approved objective wording, include the relevant evidence, and avoid unsupported identification claims.