element

Peroxide Bubbles

This time we are going to talk about a very important substance, oxygen. Oxygen is the third most abundant element in the universe, coming after hydrogen and helium. About 20% of the air around you is made up of oxygen, and it is vitally important to life on Earth. It is also important for combustion, and that is what we will explore today.

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Pot of water
Heavy water played an important role in the development of the atomic bomb. What is heavy water?

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wood and ashes
The wood in this pile will be reduced to this much ash when it is burned. What happens to the rest of the mass from the wood?

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