What+are+the+characteristics+of+a+gas?

Characteristics of a gas. By: Paige Chase Characteristics:  Gases have a very low density. A gas has no real/definite shape or volume, it will expand to fit it's container. Gases have one of a kind physical and chemical properties. Some gases are colored and while others are invisible. Gases can be toxic and they can be harmless. Some gases are heavier and others are lighter than air. Gases can be odorless or they may have a smell.

Examples: -Methane. The chemical formula is CH4. Methane is a colorless and odorless gas. Methane is also flammable and methane is not toxic. http://portal.lions.k12.ar.us/tjones/physci/Photos/Methane-Molecule.gif

 -Sulfur dioxide. The chemical formula is SO2. Sulfur dioxide is a heavy and colorless gas, it is also a poisonous gas and it has a irritating smell.

-Hydrogen. The Chemical formula is H2. It is a colorless, tasteless and a odorless gas. It's highly flammable, it is the lightest of all the gases.

-Helium. The chemical formula is He. Helium is colorless, tasteless and a odorless gas. It is not toxic.

-Chlorine. The chemical formula is Cl2. It has an unpleasant smell, it has a yellowish-green color. It is toxic, it is about 2.5 times heavier than air.

http://www.amazingrust.com/Experiments/how_to/Images/Chlorine_gas.jpg



 "Helium ." Wikia. Web. 11 Feb. 2010. .

"Chlorine." General Characteristics. Web. 11 Feb. 2010. .

"Hydrogen." Web. 11 Feb. 2010. 

"Methane." Web. 11 Feb. 2010. .

"Sulfur Dioxide." Web. 11 Feb. 2010. .

"Methane." Chemical of the Week. Web. 11 Feb. 2010. .

"Properties of Gases." Web. 11 Feb. 2010. .

Teachers' Domain, Helium Is Boring, published August 9, 2007, retrieved on February 11, 2010, http://www.teachersdomain.org/resource/lsps07.sci.phys.matter.gases/

"Elements or compounds that are Gases at Room Temperature ." Gases. Web. 11 Feb. 2010.  /topicreview/bp/ch4/1frame.html>.