Question

using the brightline emission spectrum chart below, identify the elements present in the mixture. a. lithium and cadmium are in the mixture. strontium is not in the mixture. b. lithium and strontium are in the mixture. cadmium is not in the mixture. c. cadmium and strontium are in the mixture. d. all of the shown elements

Explanation:

Step1: Observe spectral lines

Each element has a unique bright - line emission spectrum. Compare the spectral lines of the mixture with those of lithium, cadmium, and strontium.

Step2: Match lines

The spectral lines of the mixture match the lines of lithium and strontium, and there are no lines corresponding to cadmium's unique spectral lines.

Answer:

B. Lithium and strontium are in the mixture. Cadmium is not in the mixture