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Iun: Modern Atomic Theory
This is an excellent site with information on the discovery of the atom and the different models. Includes a sample question and answer using Planck's constant.
CK-12 Foundation
Ck 12: Modern Atomic Theory
[Free Registration/Login may be required to access all resource tools.] Rutherford's model of the atom was better than earlier models. But it wasn't the last word. Danish physicist Niels Bohr created a more accurate and useful model....