If your first reaction when thinking about the periodic table relates to Mr. White’s chemistry class in “Breaking Bad,” let’s ...

How do we calculate mass and atomic numbers? VideoHow do we calculate mass and atomic numbers? This video is an interactive lesson in calculating an atom's mass and atomic number.

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Periodic Table as Arranged by Mendelejeff attention ... It is, however, to the Russian chemist, Mendelejeff, that chemistry owes the system of classification of the elements which is based on ...

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These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon ...

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One of the most overlooked ways of preventing dental disease is with the use of fluoride. It's essential for a healthier ...