Sciece (chemistry) - help, Tuesday, September 25, 2007 at 4:32pm
what is the particle theory
Check this site.
http://www.le.ac.uk/se/centres/sci/selfstudy/particle01.html
The particle theory is a concept in chemistry that explains the behavior and properties of matter. It suggests that all matter is made up of tiny particles, such as atoms or molecules, that are constantly in motion.
To understand the particle theory, you can follow these steps:
1. Begin with the understanding that matter is made up of particles: The particle theory states that all matter, whether it is a solid, liquid, or gas, is composed of tiny particles.
2. Recognize the motion of particles: The theory emphasizes that these particles are constantly moving. In solids, the particles vibrate in fixed positions. In liquids, the particles are more loosely packed and move around each other. In gases, the particles are widely spaced and move rapidly in all directions.
3. Understand the spaces between particles: According to the theory, there are spaces between particles, even in solids. These spaces allow particles to move and interact with each other.
4. Identify the forces between particles: The particle theory acknowledges that there are attractive forces between particles. In solids, these forces are stronger and hold the particles closely together, resulting in a fixed shape. In liquids and gases, the forces are weaker, allowing particles to move more freely.
5. Explain changes in state: The particle theory explains changes in state, such as melting, boiling, and condensation. These changes occur when the motion and arrangement of particles are altered. For example, during melting, the particles gain enough energy to overcome the attractive forces and move into a more disordered arrangement.
Understanding the particle theory helps explain various phenomena in chemistry, such as diffusion, evaporation, and the behavior of gases. It provides a foundation for understanding the behavior and properties of matter at the microscopic level.