Lecture 23: Worlds Within - Atoms
What is ordinary matter made of? This lecture reviews the basic\nproperties of matter from subatomic to atomic scales, introducing atomic\nstructures, atomic number and chemical elements, isotopes,\nradioactivity, and half-life, ending with a brief overview of the four\nfundamental forces of nature: gravitation, electromagnetism, and the\nweak and strong nuclear forces. Recorded 2007 Oct 23 in 1000 McPherson\nLab on the Columbus campus of The Ohio State University.