Dmitri Mendeleev: The Development of the Periodic Table

Mendeleev changed the weight of 17 elements, but I noticed his table is still incomplete. By observing the gap in his table Mendeleev predicts the existence and characteristics of elements that have not yet been discovered. Mendeleev predicted the element eka-silicon, then the elements eka-aluminium and eka-boron by finding the gap between the elements of silicon and tin. His prediction of these unknown factors was found in his table because his predictive elements were later discovered to be gallium, bismuth, bismuth and their properties were very similar to those of Mendelayev's predictions I gave the strongest evidence.

In 1869, Dmitri Mendeleev developed an extended version of his periodic table of elements. This is a classification of elements by atomic weight and valence. Through this series, Dmitri Mendeleev can predict the existence of eight unknown elements with atomic weights between 65 and 75. In 1875 and 1886, two known unknowns were converted to known knowledge through experiments. Ga (gallium) and Ge (锗) proved to fill the two gaps in the periodic table. (6) In Asian culture there is a phenomenon called concept dream. In this phenomenon, women or men predict that their relatives are pregnant before testing. The concept of dream - still used in Korea - will determine the sex and future of the baby. Fruits - Girls - Symbols such as animals, nature, children, jewels are common themes. (Ten)

I chose to write about Dmitry Mendeleev. What does Dmitri Mendeleev know? Dmitri Mendeleev is a Russian chemist who developed a periodic classification of elements. In the Periodic Table, Mendeleev predicted the possible properties of three potential elements, leaving blanks where we thought that an unknown element was appropriate. Proof of many predictions in his life made Mendeleev the founder of the circulatory law. So who is Dmitri Mendeleev? Mendeleev was born on 8 February 1834 in the village of Werkny-Alemjani near Tiborisk in Siberia. Mendeleev is considered the youngest of 17 brothers and sisters

According to the Royal Chemistry Society of the UK, Russian chemist and inventor Dmitry Mendeleev is considered "father" of the Periodic Table of the Elements. In the 1860's Mendeleev was a popular lecturer at the university in St. Petersburg, Russia. Since then Russia did not have a modern textbook on organic chemistry, Mendelayeff decided to write a book to solve the problem of disordered elements. According to Khan Academy, Mendeleev finally wrote his authoritative chemistry textbook at that time. It is called "chemical principle" (2 vol., 1868-1870). When he was studying it, he found an important discovery that will make an important contribution to the development of the element's current periodic table. According to the Royal Chemistry Society of the UK, after writing the attributes of the elements of the card, he began to command them by increasing atomic weight. This is where he notices that certain types of elements often appear