Interactive Periodic system of chemical elements shows how we use all these strange elements
Periodic system of chemical elements (periodic table) - the classification of chemical elements, which establishes the dependence of various properties of elements on the charge of the atomic nucleus. The system is a graphic expression of the periodic law established by the Russian chemist DI Mendeleev in 1869. Its initial version was developed by DI Mendeleev in 1869–1871 and established the dependence of the properties of elements on their atomic weight (in a modern way, on atomic mass). In total, several hundred variants of the periodic system image (analytical curves, tables, geometric figures, etc.) were proposed. In the modern version of the system, elements are supposed to be reduced to a two-dimensional table, in which each column (group) defines the basic physicochemical properties, and the rows represent periods that are to some extent similar to each other.
We all know the common elements of our Planet, for example, everyone knows oxygen and helium, as they are used in everyday life. But gallium? Selenium? Rhodium? Keith Enevoldsen created an interactive periodic table that shows exactly where you can encounter such unique and even obscure elements in the picture in your life. This is how to learn a university course again, with the exception of tests, and the allowed cheat sheet on your phone.