Meet Theo Gray, chemist and author, who helps David explore how the electron configuration of an atom ... The noble gases, like neon and argon, pose a problem for chemists who prefer their ...

Figure 2: Neon charge-state yields for X-ray energies below, above and far above the 1 s-shell binding energy, 870 eV. Figure 4: Electron spectra for inner-shell and valence photoelectrons and ...