The periodic table on the website of the International Union of Pure and Applied Chemistry avoids making a decision about whether La and Ac or Lu and Lr are group 3 elements.

T he periodic table stares down from the walls of just about every chemistry lab. The credit for its creation generally goes to Dimitri Mendeleev, a Russian chemist who in 1869 wrote out the known ...

Many scientists worked on the problem of organizing the elements, but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then ...

A longstanding mystery of the periodic table involves a group of unique elements called lanthanides. Also known as rare earth ...

The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor Dmitri Mendeleev. It arranges all natural and synthetic elements by their atomic ...

The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, ...

For professor of chemistry and physics Richard Zare, the goal for CHEM 29N: Chemistry in the Kitchen is not to make students into great cooks or chemistry majors. Instead, he hopes students ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.