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 ...

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.

What Are the Five Element Families of the Periodic Table? ::: Chemists love to group elements on the Periodic Table. Recognizing similarities allows scientists to make educated predictions about how ...

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.

The modernised periodic table was designed to mark the 150th anniversary of its creation in 1869. It is estimated that about 10 million smartphones are discarded or replaced every month in the EU ...

Scientist propose reordering the 150-year-old periodic table ... Meet Harry and Meghan's new 'divisive' PR chief who rules with an 'iron fist' and spent years trying to smear the Royal Family ...