For the last fifty or so years, the periodic table has been incomplete. Elements after uranium on the periodic table have been synthesized for the past few decades, but there were always a few missing ...

For now, they're known by working names, like ununseptium and ununtrium — two of the four new chemical elements whose discovery has been officially verified. The elements with atomic numbers 113, 115, ...

Click on the picture above for an interactive guide to the periodic table. Photo: Corbis If someday we communicate with another part of the universe, we can be sure of one thing that both cultures ...

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The periodic table is like a map that organizes elements based on their atomic structure and properties. It helps scientists and students study and understand the vast variety of elements and how they ...

All good geeks are aware of the proliferation of period tables on the internet. The effort that has gone into this is amazing, and as a search-able tool it is great and loads of fun complete with ...

Play this game to learn about lots of different elements in the periodic table. While you're watching, look out for where different elements are found in the periodic table. Mrs Roberts: So, here I ...

This lesson utilizes an adaptation of the board game Periodic: A Game of the Elements to help students better understand both general periodic trends and the law of conservation of energy. This ...