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Helium - 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. This one is about helium, Donald Duck voices, and floating balloons.

A helium atom weighs four times as much as a hydrogen atom...

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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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