The Particle Theory
What is a particle?
A tiny piece of matter we cannot see.
When a liquid changes to a solid, it is called?
Freezing
Pizza
(Mechanical) Mixture
What is a mixture?
Mixtures are two or more substances that are mixed together but not chemically joined.
Particles move faster when this happens to them.
When they are heated.
This state of matter has a fixed shape.
Solid.
Salt
Pure Substance
What are the two main types of pure substances?
Elements and Compounds
Particles are doing this all the time.
Moving
Which two states of matter can flow?
Liquid and Gas.
Air
Mixture (Solution)
The periodic table contains what?
Elements
True or False: Particles in a solid are touching.
False - All particles have empty spaces between them.
In which state of matter are the particles farthest apart?
Gas.
Aluminum Foil
Pure Substance
What is a compound? Give an example to support your answer.
A compound is a substance formed when two or more elements are chemically joined (Example: NaCl aka salt)
The Particle Theory states this about particles in a pure substance.
Particles are identical (all the same) in a pure substance.
During distillation, we separate a mixture by boiling and evaporating one substance, then changing that gas back to a liquid in a cooling chamber and collecting it. When a gas cools and changes to a liquid it is called...?
Condensation
Tap Water
Mixture (Solution)
Give three examples of an element.
varies