Periodic Table of the Elements, as of January 2019
(Image from Wikipedia Commons, public domain)
2019 was the 150th Anniversary of Dmitri Mendeleev's publication of the first periodic table.
The above is a later version created by D. Mendeleev for a textbook.
2019 was declared the International Year of the Periodic Table by UNESCO.
BONUS 1: Elemental Haiku from SCIENCE magazine
BONUS 2: Periodic Table of Videos talking about each element, from the University of Nottingham
BONUS 3: Video animation of 300 years of discovery of the elements by Jamie Gallagher
Chemistry - "The branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances." - Oxford English Dictionary
Biochemistry - "The science dealing with the substances present in living organisms and with their relation to each other and to the life of the organism." - Oxford English Dictionary
Here are some links to entertaining and instructive sites based on the Periodic Table of Elements.