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The Periodic Table

History of the Periodic Table

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History of the Periodic Table
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The periodic table began to be created with the discovery of different elements. Several European men decided that in order to "keep order" amongst the elements, that a chart must be made that contained them all. The year was 1863 France when A. E. Béguyer de Chancourtois created the first list of chemical elements that were put into different groups. His grouping was done by atomic weight. The more an element weighed, the farther it was down on the list.

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In England, chemist John A. R. Newlands was also studying the elements. He figured out that chemical groups repeated every eight elements or so. He named this the Octave Rule(meaning "every eight"), and then compared his observations to a musical scale. People thought his ideas were ludakris and dsrequarded them for a very long time.

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"Chemists Dmitrii I. Mendeleev, a Russian, and German Lothar Meyer were working independently in 1868 and 1869 on the arrangement of elements into seven columns, corresponding to various chemical and physical properties."

Mendeleev's table, when compared to Lothar's only differed slightly. Each table was relatively accurate and both matched with one another. There were a few slight disagreements on some elements in the 50s and 60s however. Both of these chemists agreed on much of the placement of elements and shaped the very first periodic table of elements. Mendeleev, is usually the chemist who gets the credit for the creation of the periodic table. His table, along with Lothar's only differs slightly from what we use today. Of course a few more elements have been discovered, but basically the charts look the same.

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Rules of A Lab

If an experiment works, something has gone wrong.

When you don't know what you're doing, do it neatly.

Experiments must be reproducible, they should fail the same way each time.
Teamwork is essential, it allows you to blame someone else.

All unmarked beakers contain fast-acting, extremely toxic poisons.

No experiment is a complete failure. At least it can serve as a negative example.

Any delicate and expensive piece of glassware will break before any use can be made of it.