By C W J Scaife; O T Beachley
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Extra info for Chemistry in the laboratory
How does this feat confirm that air is matter? molecule The smallest particle of a pure substance that has the properties of that substance and is capable of a stable independent existence. Alternatively, a molecule is the limit of physical subdivision for a pure substance. 8 Chapter 1 Model building is a common activity of scientists, but the results in many cases would not look appropriate on a fireplace mantle. Scientific models are explanations for observed behavior. Some, such as the well-known representation of the solar system, can easily be depicted in a physical way.
C. Natural gas is made up primarily of methane molecules, which contain one atom of carbon and four atoms of hydrogen. atom The limit of chemical subdivision for matter. The subdivision of molecules into smaller particles is a chemical change. How far can such subdivisions of molecules go? You are probably a step ahead of us and have guessed that the answer is atoms. In fact, this provides us with a definition of atoms. An atom is the limit of chemical subdivision. In less formal terms, atoms are the smallest particles of matter that can be produced as a result of chemical changes.
The subdivision of molecules into smaller particles is a chemical change. How far can such subdivisions of molecules go? You are probably a step ahead of us and have guessed that the answer is atoms. In fact, this provides us with a definition of atoms. An atom is the limit of chemical subdivision. In less formal terms, atoms are the smallest particles of matter that can be produced as a result of chemical changes. However, all chemical changes do not necessarily break molecules into atoms. In some cases, chemical changes might just divide a large molecule into two or more smaller molecules.
Chemistry in the laboratory by C W J Scaife; O T Beachley