Resources: The Invisible Atom

• Properties of Matter: Particles of an Atom - FCPS Promotion Benchmark 8 Lesson Review. See also, Properties of Matter: Differentiate Elements & Compounds - FCPS Promotion Benchmark 7 Lesson Review.
• Introduction to Atoms, courtesy About.com
• Ion(s) and Isotope(s). See also a list of common ions.
• Radiometric (or absolute) dating using carbon-14 (¹⁴C), an isotope of carbon-12 (¹²C): background information and related questions; related B.C. comic, courtesy Creators Syndicate, Inc. See also, the Carbon-14 Dating Calculator.
• The Elements, by Tom Lehrer (a Macromedia Flash animation)
• The Periodic Table of the Elements
  1. Chemical Elements.com - An Interactive Periodic Table of the Elements (featuring "Bohr models" of the elements)
  2. ChemiCool Periodic Table and More
  3. WebElements Periodic Table
  4. The ACS Periodic Table, American Chemical Society. See also, The Periodic Table of the Elements.