Explanation:

On January 29, UNESCO official launched the International Year of the Period Table of Chemical Elements (IYPT-2019) at its headquarters in Paris to raise awareness of chemistry and its applications for sustainable development. The year 2019 also marks the 150th anniversary of its creation by Russianscientist Dmitry Ivanovich Mendeleev. The aim of the year-long celebration is to recognize the importance of the periodic table as one of the most important and influential achievements in modern science, reflecting the essence not only of chemistry, but also of physics, biology and other basic sciences disciplines. The Periodic Table of Chemical Elements is a unique tool that enables scientist to predict the appearance and properties of matter on the Earth and in the rest of the Universe.