In this week's news, Hank explains how earthworms are doing nanotechnology for us, Americans will soon be eating genetically modified salmon, the Russians are going back to space, and another reason to drink less soda.

While most elements can easily be categorised as either metals or non-metals, a few have physical and chemical properties that are in between, which makes them harder to classify.
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A Twig Science
Glossary Film.
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It explains occurrence, electronic configuration, atomic and ionic radii, ionization enthalpy, physical and chemical properties of GROUP 16 elements.

It's time to check out Group 16 on the periodic table, the chalcogens. This includes oxygen, sulfur, selenium, tellurium, polonium, and livermorium. What can we say about their properties, reactivities, and applications? Let's find out!

Learn the basics about How the elements are laid out in the periodic table? Why are they all named and placed that way? Find out more in this video!