The year 2019 marks 150 years since Dmitri Mendeleev's 1869 discovery of periodicity in the chemical elements and his arrangement of the elements into the Periodic Table that we know today. With the support of many academic and industrial partners, the year has been celebrated around the world as the International Year of the Periodic Table (IYPT2019) with exhibitions, activities, events and more. This year of celebrations comes to a close with the IYPT2019 Closing Ceremony held in Tokyo on 5 December, 2019. » Veja mais...