Using data collected from a spectrometer, with a diffraction grating of 100 lines/mm, I have collected a set of data. From this I have calculated wavelengths for the 1st and 2nd order lines of the three brightest visible colors, which were Blue/Violet, Green, and Orange. To complete my lab Im required to identify the element that produced the emission spectrum, however Im really unclear how to go about this. So, Im left with wavelengths for 1st and 2nd order lines of each color, Ive tried to compare this to lists of wavelengths for various emission spectrums Ive found, but I see no way to take these wavelengths and positively identify my element. Most lists of wavelengths I find fall within the same range. What is the clear cut method that Im missing to correlate my wavelengths to another set given so as to identify my element?