3.2. Chemistry of Compounds http://www.ck12.org
3.2 Chemistry of Compounds
- Identify the type of matter called a compound.
- Explain how the same elements can form different compounds.
- List two types of chemical compounds.
Look at all the colors you can make by mixing together just a few colors of paint. In the photo above, the rainbow of
colors on the brush formed from just four paint colors: green, yellow, red, and blue. The same thing is true of matter
in general. By combining just a few different elements, you can form many different chemical compounds.
What Are Compounds?
Acompoundis a unique substance that forms when two or more elements combine chemically. Compounds form
as a result of chemical reactions. The elements in compounds are held together by chemical bonds. A chemical
bond is a force of attraction between atoms or ions that share or transfer valence electrons. For a video introduction
to compounds, go to this URL: http://www.youtube.com/watch?v=-HjMoTthEZ0.
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/195Water is an example of a common chemical compound. As you can see in theFigure3.3, each water molecule
consists of two atoms of hydrogen and one atom of oxygen. Water always has this 2:1 ratio of hydrogen to oxygen.