CHE 131 Lecture 4, 1/30/20061AtomsLecture four (Chapter two)Benjamin S. HsiaoDepartment of ChemistryStony Brook UniversityAtomic StructureElectrical charges of the same type repel one another, and charges of the opposite type attract one another.J.J. Thompson(1856-1940) English physicistAt the turn of the century, Thompson experimented with what he called a cathode-ray tube. He found that the beam was made up of negatively charged particles, now called electrons.16001700180019002000Radioactivity
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