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VISIT THESE SITES FOR SOME HISTORYSee What they were teaching when your teacher was going to school! A one-page summary of particle physics and the status of the Standard Model (en Español). A brief history of particle physics (en Español). PARTICLE PHYSICS TIMELINE FROM http://particleadventure.org
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NOTICE: a large portion of this page are cut and pastes fHewitt's Chapter 17 Web Page |
17.1 ELEMENTSChemicool Periodic Table- Produced by MIT student David Hsu, this periodic table is indeed cool! Choose an element by typing its name or clicking on the periodic table. A new page will load with a detailed list of the properties of that element. Periodic Table of the Elements- Click on this periodic table to get all sorts of information, including history, properties, forms, uses, and costs of an element. This site was produced by the Chemical Science and Technology Division of Los Alamos National Laboratory. WebElements- Perhaps the king of WWW periodic tables, this huge resource was created by Mark Winter of the University of Sheffield, England. Clicking on an element will bring you to an information menu that includes the element's background, chemical data, crystallography, physical data, isotopes, spectroscopy, electronic data, biological data, and geological data. Materials Science- Learn about metals, ceramics, semiconductors, and polymers. Provided by the University of Illinois's Materials Science and Engineering Department, this site offers an introduction to classes of materials. Chemical of the Week- Read these fact sheets to learn about the chemistry of buckyballs, autumn colors, ozone, fertilizers, and more. Professor Bassam Z. Shakhashiri distributes these fact sheets to students in his general chemistry course at the University of Wisconsin. The Periodic Table of Comic Books- This page provides you with a comic book reference to almost any element. 17.4 EVIDENCE FOR ATOMSHow Do We Know Any of This? In this lesson from The Particle Adventure, you will learn about the experimental evidence that supports the modern theory of the atom. 17.5 MOLECULESMolecular Models- Maintained by Eastern University, this hypermedia tutorial provides information on chemical bonds, molecular shapes, and molecular models. Downloading the Chemscape Chime plug-in allows you to create and manipulate molecular structures. Molecule of the Month- Check out this site for a list of molecules viewable in HTML, Chime, Java, and VRML. This page is maintained by the Chemistry Department at the University of Bristol, England. 17.6 COMPOUNDSChemical Bonding: Introduction- This is a nice introduction to chemical bonding, including ionic and covalent compounds. This lesson comes from CHEMystery, a student-created interactive guide to chemistry. 17.7 THE ATOMIC NUCLEUShttp://physics.berea.edu/~king/Teaching/ModPhys/QM/atom.htm Rutherford's Model of the atom:Rutherford proposed the nuclear model of the atom on the basis of his experimental results of the scattering of alpha-particles by the atoms. In his experiment alpha-particles emitted with speeds of about 2 x 107 m/s struck a thin gold foil several thousand atomic layers thick. Most of the alpha-particles pass undeflected through the foil, but some were scattered at some angle. According to Rutherford's model of the atom, almost the entire mass and the total positive charge of the atom are confined within a very small part at the center of the atom. This part is known as the nucleus of the atom and has a radius less than 10-12 cm which is small compared to the radius of the atom (approx. 10-8 cm). The electron in the atom revolves in orbits around this central core. The radii of these orbits determine the atomic radii.
The Bohr Atom
Atomic Structure- Find out more about the structure of atoms in this lesson from ChemWeb, an online introductory chemistry course. Topics include subatomic particles, atomic numbers, and Avogadro's number. The Particle Adventure- Produced by the Particle Data Group, this site explains the current theories of fundamental particles and forces. Bohr Model- Learn about the Bohr model of the atom with this QuickTime movie (7.5M). 17.8 ELECTRONS IN THE ATOMModels of Electron Orbitals- The arrangement of electrons in atoms can get quite complicated. Check out this page for 3-D (VRML) models of electron orbitals. Millikan's Oil Drop Experiment- This QuickTime movie (9.1M) introduces Millikan's oil drop experiment, which led to the determination of electron charge. Electron Configuration and Periodicity- How does the atomic structure of an element relate to its position in the periodic table? Find out in this lesson from ChemWeb, a student-created online chemistry course. 17.9 THE PHASES OF MATTERThe States of Matter- Part of the CHEMystery online guide, this page links to lessons covering the three states of matter. Phases of Matter- Get the facts on the three states of matter in these lessons from Suspension of Disbelief, a student-created chemistry site. |
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