The History of the Elements and Periodic Table

Greek thinkers and early adopters noticed that things differ from each other around 400 BC and are classified into smaller groups. They use "elements" and "atoms" to describe the smallest parts of various substances. For over 2000 years, the four elements "Earth, Fire, Water, and Air" have been used to explain much of the story of the world. We must do something to put together our thoughts and observations about our elements. By 1860, a way to summarize the 60 elements known to scientists was needed.

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.

Creation of the Periodic Table of the Elements is one of the most important achievements in chemical history. When Dmitry Mendeleev announced his first periodic table, people had a lot of understanding of the individual elements, but the elements related to each other were not clear. Mendeleev helped to completely change our view of the world. About 60 elements are known in the Mendeleev era, and the atomic weight of most of these elements is determined. We are waiting for more elements and atomic properties to be discovered. Today, electrons are important to understand the relationship between different elements, but since protons, neutrons, and electrons have not been discovered during the Mendeleev era, he needs to organize their own forms based on other factors had. The reason for the periodicity of the periodic table helps clarify patterns and trends. For example, the lightest element in the first row is not exactly the same, but each of the eighth elements has much in common.

How do three stars and elements open the way of progress looking at the same information from different angles?