(February 8, 1834 – February 2, 1907)

Although previous attempts were made at sequencing and classifying elements, Dmitri Mendeleev conceived the most elaborate and the most accurate of them all. He is therefore credited with one of the most important scientific innovations of the 19th century. His 1869 publication was praised for many insightful inclusions. Chief among these were the periodic trends of all the known elements, the relationships of those residing in the same groups, and the possibility of predicting the characteristics of many undiscovered ones. The impacts of Mendeleev’s works on Chemistry and Atomic Physics were enormous. With them, it became easier to anticipate the properties, behaviors and nature of not only elements, but their compounds and mixtures as well. Even today, any student who understands the period table will have little or no problem in comprehending most other aspects of chemistry. As straightforward as the table may seem now, its significance cannot be overemphasized. It was after publishing his Periodic Law that Dmitri Mendeleev co-worked with Lothar Meyer and Robert Bunsen in improving the periodic table. He also made lesser-known (but important) contributions to the fields of hydrodynamics, meteorology and geology. His other credits include the invention of pyrocollodion, which he achieved while working on nitrocellulose. An impact lunar crater Mendeleev is named after him; and so is the radioactive transuranic element mendelevium.

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