Emission spectra of flame test metals: lithium, sodium, strontium and copper

An example figure from the Line Spectrum generator.

Bright-line emission spectra of lithium, sodium, strontium and copper on one wavelength scale, with an unknown made of two of them — Bright-line emission spectra of four metals used in flame tests, lithium, sodium, strontium and copper, each with a few of its strongest visible lines, on one 400 to 700 nm scale. Under them, an unknown shows every line of sodium and of strontium for students to identify.

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Answer key

Lithium: 460.3, 610.4, 670.8 nm
Sodium: 568.8, 589.0, 589.6, 616.1 nm
Strontium: 460.7, 483.2, 496.2, 548.1, 640.8, 679.1, 687.8 nm
Copper: 465.1, 510.6, 515.3, 521.8, 570.0, 578.2 nm
Unknown: sodium and strontium

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