Periodic Table Research Paper

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Aaron Wong

History and Development of the Periodic
Table

Period 11

The most basic arrangement of the periodic table was in 1649. By this time, many elements have been known but the first scientific discovery of an element was in 1649. Hennig Brand discovered phosphorus, the first element discovered through scientific inquiry. He attempted to create a Philosopher’s Stone which was supposedly able to turn metals into pure gold. During his experiment, he heated residues from boiled urine, and a liquid dropped out and turned into flames. This was the first discovery of phosphorus. During the next 200 years were when chemists started to recognize patterns in properties of elements and gained much knowledge about the properties and compounds of them.

In the late 1700s, the first extensive list of elements was created. It was created by Antoine Lavoisier, a French chemist. The first list contained 33 elements and was distinguished between metals and non-metals, dividing the few known elements into four classes. He devised a naming system for the discovery of new elements. Additionally, Antoine Lavoisier was the first chemist to define an element as a substance that cannot be broken down by chemical means. His findings greatly contributed and impacted many chemists and their ideas on elements. It helped them start to categorize and understand the elements more thoroughly. In 1803, John Dalton developed an atomic theory based off the fact that elements were combined with each other according to different ratios by weight. As a part of his theory, Dalton built a scale of atomic weight based on the hydrogen atom. John Dalton calculated the first relative weights of atoms and compounds. In 1808, he published a list of elements along with their atomic weights.

Around 1810 to 1830, Jöns Jakob Berzelius, a Swedish chemist, developed a table of atomic weights that contained all of the elements known to that date. He also...
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