The team of physicists from The University of Arizona say they were motivated by the possibility of Compact Ultradense ...

Asteroid 33 Polyhymnia is at the center of an exciting new study that suggests it may hold elements that have never been ...

The periodic table is an icon. But chemists still can’t agree on how to arrange it New data about the elements and their relationships have led to debate over the 150-year-old table’s optimum ...

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 other words, it contains elements not on the periodic table at all. These elements would be stable around atomic number 164, which is far denser that Osmium, the densest known naturally ...

It's Elemental By Kate Becker Posted 05.12.11 NOVA Whether they are created by nature or in the lab, chemical substances are all made of some combination of just 118 pure elements. These elements ...

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

On the periodic table, most elements have at least one stable form. But others have only unstable forms, all of which decay by emitting radiation and transforming into different elements until ...