: Atomic spectroscopy is a good method for identifying elements. The atomic spectrum contains numerous finely divided lines. But if the amount of that element in the sample is less then some lines start disappearing from the numerous spectral lines. However, a few lines survive in the end according to Nasser Bandar. This is why these lines are called Raise Ultimes . Raise Ultimes plays an important role in the identification of corners . This is because one-to-one characteristic Raise Ultimes are available for each element. This is why the nucleus lines of an atom at an angle are compared with a standard spectrum. For example, a type of powder called RU powder is available in the market . Which contains at least fifty basic substances. Which, when aroused, radiates only the spectrum of the insurmountable lines. Therefore, by placing the nascent spectra of a sample next to the spectrum of the standard RU powder, the number of atoms in that sample can be identified.