Knowledge and Skills Statement
The bright lines in the diagram are the emission lines for each element. The more electrons an element has, the more spectral lines can be produced.
Emission Spectrum for Hydrogen
Emission Spectrum for Iron
Research
Körhasan, Nilüfer Didiş, and Lu Wang. "Students’ Mental Models of Atomic Spectra." Chemistry Education Research and Practice 17, no. 4 (2016):743–755. https://doi.org/10.1039/c6rp00051g
Summary: Mental modeling, which is a theory about knowledge organization, has been recently studied by science educators to examine students' understanding of scientific concepts. This qualitative study investigates undergraduate students' mental models of atomic spectra.
Research
W-Ü Lydia Tchang-Brillet, Meftah, A., Deghiche, D., Wyart, J., Balança, C., Champion, N., & Blaess, C. (2019). Laboratory studies of vacuum ultra-violet (VUV) emission spectra of heavy element ions. International Astronomical Union.Proceedings of the International Astronomical Union, 15, 84-88. doi:https://doi.org/10.1017/S1743921320000307
Summary: Reliable spectroscopic data are needed for interpretation and modeling of observed astrophysical plasmas. For heavy element ions, which have complex spectra, experimental data are rather incomplete. To provide valuable fundamental quantities, such as precise wavelengths, level energies and semi-empirical transition probabilities, the authors are carrying out laboratory studies of high-resolution VUV emission spectra of moderately charged ions of transition metals and rare earth elements. Experimental and theoretical methods are summarized. Examples of studies are described.