PARIS. The Periodic Table of Chemical Elements turns 150 years old, and the US science agency holds a year of events to celebrate this event.
Anyone who has studied chemistry learns a table that organizes all chemical elements by the number of protons in a given atom and other properties. Russian scientist Dmitri Mendeleev published the first such table in 1969.
On Tuesday, the American Organization for Education, Science and Culture opened the “International Year of the Table of Chemical Elements” from a ceremony in which, among other high-ranking officials, were the Nobel Prize in Chemistry and the Minister of Science of Russia.
Other events that UNESCO organizes this year include an online competition to test the knowledge of high school students at the table and scientific experiments conducted in schools around the world.