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Hydrogen - 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 hydrogen and an exploding balloon. But what creates the fireball?

Watch Think 3 Multiple Choice &
5 Open Answer Questions Dig Deeper Learn More Discuss 1 Guided Discussion &
2 Open Discussions …And Finally

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You are holding three balloons, each containing a different gas. Balloon A is full of hydrogen, balloon B is full of deuterium, and balloon C is full of carbon dioxide. When released, one balloon falls to the floor and the other two rise to the ceiling, with one balloon rising faster than the other. Which of the following statements is true?

a

Balloon A is on the floor and B rose faster than C.

b

Balloon C is on the floor and A rose faster than B.

c

Balloon C is on the floor and B rose faster than A.

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