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hy·dro·gen
 hydrogen
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- pronunciation:
- haI
dr
jn
- features:
- Word Explorer, Word Parts
| part of speech: |
noun |
| definition: |
Hydrogen is a gas that burns easily and is one of the chemical elements. Hydrogen atoms combine with oxygen to make water, and it is found in all living things. It's amazing that two things that are gases--hydrogen and oxygen--come together to make something we usually see as a liquid, but it's true. Hydrogen combines with many substances and has many uses, including as a fuel.
The sun is a huge ball of burning hydrogen plus another gas called helium. |
| related words: |
bleach |
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