Spectroscopy - The Experiment

More Known Elements

You will probably only need to record the color of the flame test or discharge tube in this section but you may need the other information to answer some of the postlab questions.

The emission lines of four other elements were calculated in the same way you did the previous four. You may view the flame test or discharge tube and the emission spectrum by clicking on them in the table.

Element	Excited by	Spectrum	Spectral lines (in nm):
Barium	flame	spectrum	752, 747, 728, 719, 707, 673, 668, 662, 656, 652, 617, 613, 606, 587, 578, 556, 552, 496, 457
Mercury	discharge	spectrum	738, 694, 618, 584, 581, 578, 549, 437
Potassium	flame	spectrum	701, 696, 409, 405
Helium	discharge	spectrum	708, 669, 588, 503, 469, 449
Copper	flame	-	-