L1_Particulate Nature of Matter
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9 Terms
Matter
anything that occupies space and has mass
The Five Postulates of the Particle Theory of Matter
All matter is made up of tiny particles
Particles are constantly moving
There are spaces between particles
Particles attract each other
Temperature affects particle motion
Diffusion
natural spreading of one substance into another without mixing
Brownian Motion
observed when tiny particles suspended in a fluid move randomly
discovered by Robert Brown while observing pollen grains under a microscope
caused by collisions with unseen moving particles
Compression and Expansion
refers to the process of increasing and decreasing volume in relation to gases or other fluids
Particle
smallest unit of matter
Atom
basic unit of an element
Molecule
group of atoms chemically bonded together
Intermolecular Force
attraction between particles of a substance
Note 
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