2019: The International Year of the Periodic TableLunes, 20 de may de 2019
150th anniversary of the Periodic Table
December of the 2017 celebrated the General Assembly of the United Nations that it designated 2019 as the international year of the periodic table of the chemical elements, like this then commemorates the 150º anniversary of the discovery of the periodic table by the scientist Dmitri Mendeleev.
The ordering of the chemical elements in the periodic table is classified by atomic weight and similar chemical properties between elements, in order to provide a tool comprehensive and useful to scientific level. The structure of the table shows periodic trends: columns (groups) and rows (periods) with three categories: metals, metalloids and no metals, with 118 elements.
The periodic table presents each element with a symbol: indicating the number of protons (atomic number) and the sum of protons and neutrons in the nucleus of the atom (massive number).
Therefore, Mendeleev structured the elements that were known at the time when the scientific world had not yet reached a consensus on the terminology. The classification he made some prediction calculations, leaving "spaces" for future chemical elements.
An example of the extension of the elements is the 2016 with Nihonium (113), Moscovium (115), Tennessine (117) and Oganesson (118).
It should be added that each atomic symbol is related to a person in mathematics, for example: Ne (Neon, 10) for Isaac Newton, (Einsteinium, 99) for Albert Einstein.
So, we can remind the name of Albert's Einstein, Barcelona enjoyed his attendance and conference at the Royal Academy of Sciences and Arts of Barcelona in 1923. The Academy this year can view the periodic table in a wide roll up with all the information and diurnal guided tours.