Friday, September 18, 2015
Atomic Theories
On Wednesday, we started taking notes for our unit over atomic structure and radioactivity. The notes were over atomic theories, specifically those created by Dalton, Rutherford, and Thompson. Dalton's theory includes the following statements: all elements are composed of atoms; all atoms of a given element are identical; atoms of different elements are different; compounds consist of the atoms of different elements; and atoms are indivisible and can't be created or destroyed in a chemical reaction. Rutherford's theory consisted of of atoms containing a small, dense region, or the nucleus, which contained molecules of a positive charge, also known as protons. Thompson's theory entailed that atoms contained negatively charged molecules, or electrons.
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This is a great post that really summarizes how the full structure of the atom was discovered. However, I think that you could have been a little more in-depth. For example, when you said that Thompson's theory entailed that atoms contain electrons, how did he prove that the theory was true? By being more in-depth, you can avoid questions like this that future readers of your posts may have.
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