Line spectra of made-up elements X, Y and Z with an unknown

An example figure from the Line Spectrum generator.

Emission spectra of three made-up elements, X, Y and Z, each with three lines, and an unknown made of two of them — Emission spectra of three made-up elements, X, Y and Z, each drawn with three lines typed in by the teacher, so students can’t look the answer up. The Unknown strip under them shows every line of Element X and Element Z, and students identify it by matching lines.

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Answer key

Element X: 425.0, 510.0, 630.0 nm
Element Y: 455.0, 545.0, 600.0 nm
Element Z: 480.0, 575.0, 665.0 nm
Unknown: Element X and Element Z

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