However, one brilliant philosopher, Democritus, argued that there is a limit. Most, like Aristotle, argued that matter could be divided infinitely. How long could you continue cutting, assuming that you had no limitations based on your own abilities? Is there a limit on how small matter can be broken up into, or could you infinitely divide matter into smaller and smaller pieces? This argument dates as far back as the Greek philosophers. Like the ancient Greeks we can perform a simple thought experiment that raises a very important question for modern chemistry: suppose you were given a piece of aluminum foil and asked to cut the foil in half over and over. What are the smallest building blocks of everyday objects? This is a question that has interested man since the age of the Greek philosophers. 2.1 Atomic Theory with Historical Perspectives 2.2 Introduction to Elements and the Periodic Table 2.3 Dmitri Mendeleev and the development of the periodic table 2.4 Families of the Periodic Table 2.5 Defining the Atom Basic Atomic Structure – electrons, neutrons, and protons 2.6 Atomic Number – Protons Determine the Identity of an Element 2.7 Atomic Mass, Isotopes, and Allotropes 2.8 Electronic Structure of Atoms The Four Electronic Quantum Numbers Electron Orbital Filling Rules Electron Configurations and the Periodic Table Electron Configuration Solitaire Electron Configuration Shorthand Electron-Dot Symbols 2.9 Periodic Table Trends Atomic Size Electronegativity Ionization Energy Metallic and Nonmetallic Character 2.10 Focus on the Environment – Nuclear Energy Introduction to Radioactivity Nuclear Fission Reactions and Energy 2.11 Chapter Summary and Homework 2.12 ReferencesĢ.1 Atomic Theory with Historical Perspectives This text is published under creative commons licensing, for referencing and adaptation, please click here.
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