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.

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.

The periodic table shows all the atoms that everything in the known universe is made from. It’s kind of like the alphabet in which only 26 letters, in different combinations, make up many thousands of ...

Given the enormous popularity of the periodic table in chemistry, doesn't it make sense to build a periodic table for biology? Pawan Kumar Dhar visualises the anatomy, the potential pay-offs and ...

This part of the periodic table was the playground of Glenn Seaborg, an American physicist. In 1940 Seaborg was part of a group at the University of California, Berkeley, that made neptunium (93).

The 4D Periodic Table of Chemical Elements is an answer to this question, having a geometric structure related to the hypercube, a four-dimensional cube. Professor Haresh Lalvani published his paper ...

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

Give each student a Periodic Table of Energy Levels activity sheet. This table contains energy level models for the first 20 elements. The electrons are included only for the atoms at the beginning ...

This article was originally published with the title “ The Periodic Table of the Cosmos: 100 Years of the Hertzsprung-Russell Diagram ” in Scientific American Magazine Vol. 305 No. 1 (July ...