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Gas (view source)

Revision as of 02:09, April 28, 2007

186 bytes added , 02:09, April 28, 2007

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~~A gas~~ is ~~a state~~ of ~~matter, as opposed to liquids and solids. Examples include~~ [[~~methane]], [[oxygen~~]], [[~~hydrogen~~]] and ~~[[carbon dioxide]]~~. ~~Most~~ are ~~invisible~~.

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'''Gas''' is one of the states of [[matter]], in which the [[molecule]]s move about unconstrained by each other and will expand into any available space.

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Our atmosphere is mostly composed of gases.

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Many gases are colorless, however, some are not. For instance, chlorine gas is greenish-yellow, and N<sub>2</sub>O<sub>4</sub> is reddish-brown.

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[[Category:physics]]

[[Category:chemistry]]

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