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Atomic Structure
Part 1 of Paper
.... the 19th century that this concept was developed into a scientific theory. Almost as soon as the modern atomic theory was established, it was discovered that atoms were not the basic building blocks that were being sought. Instead, atoms consist of electrons that are bound to a tiny nucleus. The nucleus is made of neu.... Part 2 of Paper
....h century, and the first explicit evidence was found when Brownian motion was correctly understood and studied in about 1906 by physicists Albert Einstein and Jean-Baptiste Perrin. There are many kinds of molecules, and it was clear that simplifying ideas were needed. The Russian chemist Dmitri Mendeleev argued that there was a set of more basic entities of which all molecules are constructed, the chemical elements, which consist of atoms of only one kind. In about 1869 he published his periodi.... |
| Number of words: 827 - Approximate pages: 4 |
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