Some asteroids have measured densities higher than those of any elements known to exist on Earth. This suggests that they are at least partly composed of unknown types of "ultradense" matter that ...

On a stage in the United Nations Educational, Scientific, and Cultural Organization headquarters in Paris, Yuri Oganessian holds a microphone in one hand and a small remote control in the other. Over ...

The periodic table of the elements, principally created by the Russian chemist, Dmitry Mendeleev (1834-1907), celebrated its 150th anniversary last year. It would be hard to overstate its importance ...

Every student deserves to be able to independently explore periodic trends in a chemistry course; with the Accessible Audio Periodic Table, students can now access a free tool that incorporates ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

The periodic table captures a subtle pattern that runs through the chemical elements, the fundamental building blocks of everything around us: from the aluminium in bike frames to the xenon gas in ...