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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