The Periodic Table is an obvious port of call, not expecting to find 2019 was the 150th anniversary of the Periodic Table which led me to looking to the origin of the Table. I am researching water to satisfy a curiosity that has been triggered by a question asked “what is water?”, I am thinking this will be a forever lifetime task. You mention there were 69 known elements in1869, other sources have the figure ranging from 60 to 64.

Thank you for your article much appreciated. Follow IYPT2019 on Twitter: Stay tuned throughout the year as we feature more scientists who have discovered different elements:.Find more information on the International Year of the Periodic Table on the official website.How are you celebrating the International Year of the Periodic Table? Let us know in the comments! Learn More

International Union of Pure and Applied Chemistry (IUPAC) “ In proclaiming an international year focusing on the Periodic Table of Chemical Elements and its applications, the United Nations has recognized the importance of raising global awareness of how chemistry promotes sustainable development and provides solutions to global challenges in energy, education, agriculture and health.”

To celebrate this essential tool to the scientific community, the UN named 2019 the International Year of the Periodic Table (also called IYPT2019). The use of this tool is not limited to chemistry, so the information can be used in numerous ways by professionals in physics, biology, and more. The periodic table goes beyond grouping the chemical elements, as it enables us to predict chemical reactions. The United Nations Educational, Scientific, and Cultural Organization attributes the table as a “common language” for scientists, allowing for seamless communication and referencing. However, its original discovery is still known as one of the most significant achievements in science and is integral to science and technology today. Mendeleev’s periodic table of elements, a system that some call “chemistry’s roadmap”, has grown and developed over the years. In December, 2016, four new elements were added to the periodic table:Ĭelebrating the International Year of The Periodic Table Image in the public domain, via Wikimedia Commons. Notable discoveries include the 1886 findings of radium (Ra) and polonium (Po) by Pierre and Marie Curie, and George de Hevesy’s collaborative discovery of hafnium (Hf). As of 2019, “the year of the periodic table”, there are 118. In 1869, there were 69 known elements, which were used to create the first table. Thus, the system enabled him to predict the compounds and properties of to-be-discovered elements such as gallium, which Mendeleev predicted in 1871, but wasn’t actually discovered until 1875. Mendeleev’s process revealed patterns within the existing elements and also left gaps for those yet to be discovered. Periodic elements in the wild: copper (left) gold (center) and a collector’s vial of iodine (right).

Periodic table as element