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The bright-line spectra produced by four elements are represented in the diagram below.

August 2019 NY Regents Chemistry Exam


31 The bright-line spectra produced by four elements are represented in the diagram below.


Which elements are present in this mixture? (1) A and X

(2) A and Z

(3) D and X

(4) D and Z


Solution: In order to solve this problem, we need to match the lines for the mixture at the bottom to the lines of the elements given above. For example, sample A has lines around 670, 610, 500 and 460 and so does the mixture.

Answer: 2


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