Chemistry CH5.1 Revising the Atomic Model | CH5.2 Electron Arrangement in Atoms | CH5.3 Atomic Emission Spectra and the Quantum Mechanical Model | CH6.1 Organizing the Elements | CH6.2 Classifying the Elements | CH6.3 Periodic Trends
H History CH15.4 The Atlantic Slave Trade | CH15.5 Effects of Global Contact Physics Chemistry