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Caesium or Cesium - Periodic Table of Videos

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The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Here are five grams of caesium in water... but did you know caesium is also used to define the length of a second?

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Additional Resources for you to Explore
For all the basics about caesium, check out the Visual Elements Periodic Table.
For amazing photos and facts about caesium, check out The Elements by Theodore Gray.
Check out version 1 and version 2 of the Periodic Video's take on caesium or cesium.
As we saw with xenon, caesium “thrusters” can be used to steer satellites in space.
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In everyday life, which do you think is the most useful acid? And which is the most useful base?
09/10/2014 • 
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TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

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