003 Early models of the Atom
Models for the atom
Once atoms were found, it became evident that atoms were composed of protons, neutrons and electrons. The first model, due to J.J. Thomson, was the plum pudding model. This suggested that the atom was a positively charged cloud with electrons floating in it. This model is incorrect.
All models in science have to be consistent with experiment. While at McGill University in Montreal, Ernest Rutherford did a series of scattering experiments that proved the Plum pudding model was incorrect.
002 Characterization of Matter
Introduction to physical chemistry
Properties of Matter:
At the energy we mostly deal with in chemistry matter is composed of atoms, molecules and ions. From a chemical point of view, these particles interact though the electromagnetic force.
In contrast physics is interested in energies all the way up to the Big Bang Theory whence matter is composed of elementary particles. A major part of understanding matter in physics is the creation and destruction of particles. In chemistry we do not concern ourselves much with that, although photons are regularly created and destroyed in chemical processes and studied as spectroscopy.
Thermodynamics module
Chapters 1 to 6 of Physical Chemistry - Laidler, Meiser, Sanctuary
Includes multimedia that opens on relevant pages and allows the student to visualize many of the concepts by varying parameters and plotting different graphs. Things students often have difficulty with, such as isothermal, isobaric, isochoric and adiabatic process, are clearly visualized.
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Physical Chemistry textbook
by Laidler, Meiser, Sanctuary
This popular Physical Chemistry text book is now available in electronic format. We have preserved much of the material of the former hard copy editions, making changes to improve understanding of the concepts in addition to including some of the recent discoveries in physical chemistry. Many chapters have new sections and the coverage of several chapters has been greatly expanded.
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Organic Chemistry
College Level
“I know of no aid available in any format that will better enable students to learn the mechanistic aspects of organic chemistry.”
-Journal Of Chemical Education
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Introductory Chemistry
High School Level
“This program IS for the student or teacher who wants a fantastic tool to teach or learn difficult science concepts.”
- Educational Media Reviews Online
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Bryan Sanctuary, a Professor of Chemistry at McGill University (Montreal, Canada), is the primary author of this blog as well as president of MCH Multimedia. | www.mchmultimedia.com | and co- author of Physical Chemistry - Laidler, Meiser, Sanctuary
College Science Bundle: The three college level courses - General Chemistry, General Physics (calculus) and Organic chemistry, bundled together in one package.
High School Science Bundle: The two high school level courses- Introductory Chemistry and General Physics (non- calculus), bundled together into one package. This bundle is very popular with High School and Home School students.