There's a clever design to the Periodic Table. Can you guess why every element has its own special spot? See if you're right with BBC Bitesize.

By the periodic table’s logic, all d-block elements should have filled s orbitals. But copper defies that logic. It should have the electron configuration [Ar] 3d 9 4s 2.

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we ...

Today, the periodic table is organized by atomic number, which is the number of protons in the nucleus. But they didn’t know about protons then, so they organized everything by atomic weight.

In this wonderful riff on the periodic table, science communicator and PhD student Jamie Gallagher mapped out where the scientists were working when they made their discoveries. Since Lothar Meyer ...

150 years ago, Russian chemist Dmitrii Mendeleev created the periodic table of the elements, revolutionizing chemistry. Skip to content. Subscribe or renew today ...

The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dimitri Mendeleev. Mendeleev intended the table to ...

The periodic table brought solidity to a field of inquiry that had long been squishy. Sir Isaac Newton, in Query 31, a section in his 1717 work “Opticks,” listed and ranked chemical compounds ...

There's a clever design to the Periodic Table. Can you guess why every element has its own special spot? See if you're right with BBC Bitesize.