Chemistry 402: Organization of the Periodic Table . Season 1 Episode 402 | 27m 33s. Periods and families in the periodic table are described. Aired 01/04/2002 | Rating NR ...

Google search now has an interactive periodic table you can check out to learn a lot more about the elements. The company is also announcing new features for its Family Bell reminders.

In 1843, Leopold Gmelin worked with the Dobereiner’s system and developed a table of 55 elements that contained many of the similar relationships later found in the modern periodic table. Then in 1857 ...

Learn how the periodic table developed its current form when Dmitri Mendeleev organized the elements by families with similar properties as well as by relative weight.

Atomic weights of 10 elements on periodic table about to make an historic change Date: December 16, 2010 Source: University of Calgary Summary: For the first time in history, a change will be made ...