History of the Periodic Table

Things are very different from one another and can be divided into small groups within yourself. And people and Greek thinkers noticed this as early as about 400 BC. By using words like "element" or "atom" you can represent different parts, even the smallest parts. These ideas have existed for more than 2000 years ago, and ideas like water to explain the "elements" of the earth, fire, air, and "things of the world" came out. For the first time in a while, experimenters like Galileo and Bacon were greatly influenced by Democritus, Gasendi and Descartes. These played a very important role in the atomic field theory of the 17th century. .

2 History of the Periodic Table Mendeleev places the elements in the world's first periodic table, Mendeleev puts the elements in the world's first periodic table, compares the number of elements that react with each other, increases the atomic weight, I will increase it. Modern periodic table is different from Mendeleev table - he does not know that protons and electrons are different from Mendeleev table - he does not understand that protons and electrons increase the number of atoms Mass proton number proton number It is not a mass increasing atom number than an electron number electron number

Please watch the periodic table A carefully. The history of the periodic table Mendeleev arranged these elements in the world's first periodic table and Mendeleev arranged this element.

The history of the periodic table reflects deepening understanding of chemical properties for more than a century. The most important event in history took place when Dmitri Mendeleev published this table in 1869. It was based on the early discovery of scientists such as Antoine-Laurent de Lavoisier and John Newlands, but their trust Many physical elements (platinum, mercury, tin, zinc, etc.) It is known for a long time because it is present and it is relatively easy to miner with primitive tools. Around 330 BC, Greek philosopher Aristotle proposed that everything be composed of more than one root, but this idea was originally proposed by Sicilian philosopher imperialists. The four roots that were later renamed elements by Plato are soil, water, air, and fire

Another long form of elemental periodic table has been proposed. The earliest one described by A. Werner in 1905 divides each shorter period into two parts at the end of the table for their most similar longer period elements. Therefore, a plurality of connection lines connecting the periods of the Bailey type table are omitted. This type of table can also be greatly simplified by deleting the elements of the lanthanide and act system in different areas. By the middle of the 20th century, this version table (Figure 1) is now most commonly used