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Rfsfsdf Essay

  • Submitted by: p0p0p0
  • on June 24, 2014
  • Category: English
  • Length: 1,395 words

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Below is an essay on "Rfsfsdf" from Anti Essays, your source for research papers, essays, and term paper examples.

Historical Background Of The Periodic Table
The periodic table is an arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations and recurring chemical properties. Elements are presented in order of increasing atomic number. The standard form of the table consists of a grid of elements, with rows called periods and columns called groups.
The history of the periodic table reflects over a century of growth in the understanding of chemical properties. The most important event in its history occurred in 1869, when the table was published by Dmitri Mendeleev, who built upon earlier discoveries by scientists such as Antoine-Laurent de Lavoisier and John Newlands, but who is nevertheless generally given sole credit for its development.
The Beginnings of the Periodic Table
|[pic]                                       |Before written history, people were aware of some of the elements in the periodic     |
|                                             |table. Elements such as gold (Au), silver (Ag), copper (Cu), lead (Pb), tin (Sn), and|
|                                             |mercury (Hg).                                                                         |
|                                             |It wasn't until 1649, however, until the first element was discovered through         |
|                                             |scientific inquiry by Hennig Brand . That element was phosphorous (P).               |
|                                             |By 1869, 63 elements had been discovered.                                             |
|                                             |                                                                                     |
|                                             |                                                                                     |

Creating Some Early Blocks for the Periodic Table
|Between 1817-1829, Johann Dobereiner began...

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  • Submitted by: p0p0p0
  • on June 24, 2014
  • Category: English
  • Length: 1,395 words
  • Views: 173
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