Curated OER
Development of the Atomic Theory
In this atomic theory worksheet, high schoolers complete a paragraph describing the development of the atomic theory by filling in the blank with 21 terms.
Friesian School
Proceedings of the Friesian School/the Quantacized Atom
A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...