Ch. 1. The periodic system : an overview -- ch. 2. Quantitative relationships among the elements and the origins of the periodic table -- ch. 3. Discoverers of the periodic system -- ch. 4. Mendeleev -- ch. 5. Prediction and accommodation : the acceptance of Mendeleev's periodic system -- ch. 6. The nucleus and the periodic table : radioactivity, atomic number, and isotopy -- ch. 7. The electron and chemical periodicity -- ch. 8. Electronic explanations of the periodic system developed by chemists -- ch. 9. Quantum mechanics and the periodic table -- ch. 10. Astrophysics, nucleosynthesis, and more chemistry.