October 21, 2016
Dmitri Mendeleev was born February 8, 1834. In 1860 he attended an international science convention, which played a huge role in creating the periodic table. He wrote several books and textbooks, including the 500 page textbook: Organic Chemistry. He began to wonder if he could organize the periodic elements in any logical way. He wrote the elements on 65 different cards and wrote down their masses. He worked for hours until he fell asleep at his desk. Mendeleev later said that the periodic table appeared to him in a dream. When he woke up he knew how to logically organize the elements. He later said, "In a dream I saw a table where all the elements fell into place as required. Awakening, I immediately wrote is down on a piece of paper." His discovery also predicted the existence of many unknown elements. His discovery of the periodic table lead to the discovery of new elements and proved that some of the atomic masses were calculated incorrectly. Mendeleev's table helps scientists today organize all the elements in a logical way.