1) The document discusses the quantum mechanical model of the atom, including atomic orbitals and electron configurations. 2) It describes how electrons can occupy different atomic orbitals based on their energy levels and how the electron configuration notation is used to show the filling of these orbitals. 3) It also mentions exceptions to the expected electron configuration filling order that result in more stable half-filled or filled orbitals.

1. Chapter 5 Electrons in Atoms

3. Spectrum Radio waves Microwaves Infrared . Ultra-violet X-Rays Gamma Rays Long Wavelength Short Wavelength Visible Light Low energy High energy Low Frequency High Frequency

10. An explanation of the Atomic Emission Spectra

15. The Bohr Ring Atom n = 3 n = 4 n = 2 n = 1

21. Bohr’s Model Nucleus Electron Orbit Energy Levels

29. “ P” Orbitals (aligned on the x,y,z axis)

32. “ F” orbitals

33. Summary 1 2 3 4 s 1 2 S P d S P D f Energy Level (n) S P Sublevels (S, p, d, f) Number of orbitals (Odd 1,3,5,7) 1 3 2 6 1 3 5 2 6 10 1 3 5 7 2 6 10 14 Maximum Number of Electrons (orbital x 2)

36. Increasing energy 1s 2s 3s 4s 5s 6s 7s 2p 3p 4p 5p 6p 7p 3d 4d 5d 6d 4f 5f

37. Increasing energy 1s 2s 3s 4s 5s 6s 7s 2p 3p 4p 5p 6p 3d 4d 5d 7p 6d 4f 5f

47. Exceptions to Electron Configuration (optional)