Dmitri Mendeleev published his periodic system for classifying all the known elements 150 years ago. That system gave birth to the periodic table we've come to know and love. To celebrate this anniversary, the United Nations General Assembly and UN Educational, Scientific, and Cultural Organization proclaimed 2019 the International Year of the Periodic Table of Chemical Elements. C&EN is joining the celebration by releasing original content—features, videos, photos, and more—throughout 2019.
In honor of the International Year of the Periodic Table, the annual #RealTimeChem Week contest accepted entries starring the elements
Independent groups built the installations in honor of the International Year of the Periodic Table
Chemists explore the table’s heaviest chemistry.
Name as many elements as you can in 1 minute using each element's symbol.
3 standout poems embody the beauty of the periodic table and its 118 elements
YouTube star Sir Martyn Poliakoff and other essayists share personal stories about how the elements have shaped their worlds
Enthusiasts assemble personal museums of metals, minerals, and other matter as they strive to collect them all
A historical periodic table road trip
The science journalist’s new book explores the people and places at the edge of the periodic table
Despite challenging conditions and a lack of funding, some researchers still see rewards in coaxing reactivity from these nearly inert elements
These scientists want to know how elements 104 through 118 look and behave
Chemical educator and Compound Interest blogger Andy Brunning shines a light on how the big bang and reactions in stars forged the elements
Inspired by a recent periodic table–themed pub trivia event, Stereo Chemistry explores the stories behind isolating some of the heaviest elements known
Chemical educator and Compound Interest blogger Andy Brunning shines a light on the parts of the periodic table that make life possible
A towering testament to scientists’ powers of prediction, the periodic table helps us make sense of the chemical elements. You’ve probably seen it scores of times before, but how well do you really know this iconic table? Try testing your knowledge here.
High school chemistry teacher Lauren Langman inspires chemists of all ages
Investigations of the table’s shadowy realms are enjoying a renaissance
In celebration of the International Year of the Periodic Table, we picked our top entries. Vote for your favorite and view all the submissions
Opening ceremony features periodic tables galore, musical performances, and scientific talks
New data about the elements and their relationships have led to debate over the 150-year-old table’s optimum ordering
Join C&EN as we celebrate 150 years of chemistry’s most iconic symbol