Pronunciation of the English word argon.
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1. | Helium, neon, argon, krypton, xenon and radon are noble gases. | |
2. | Our atmosphere contains 21% oxygen, which is necessary for us to breathe, 78% nitrogen, and 0.9% argon. The other 0.1% consists of water vapor, carbon dioxide, neon, methane, krypton, helium, xenon, hydrogen, nitrous oxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, and ozone. | |
3. | Argon is a noble gas. | |
4. | Mars has a very thin atmosphere made of carbon dioxide, nitrogen, and argon. |