1. Matter & Chemical Change Section 1.2 Organizing matter

2. What is matter?
Anything that…
Has mass
Takes up space
Made of particles

3. Particle Model of Matter
All matter is made of particles.
Different substances are made of different particles
Particles are always in motion
Particles have spaces in between them
Particles may be attracted to each other or bonded together

4. Types of Pure Substances
A pure substance is made up of only one kind of matter and has its own unique set of physical properties
Element
cannot be broken down into any simpler substance
Compound
is a combination of two or more elements in fixed proportions

5. Mixtures A mixture is a combination of pure substances
Mechanical (Heterogeneous)
each substance in the mixture is visible
Solution (Homogeneous)
each substance is not clearly visible

6. Mixtures
Suspension
is a cloudy mixture in which tiny particles are held (suspended) with another substance, and can be filtered out
Colloid
is also a cloudy mixture, but the particles are so small that they cannot be filtered out easily

7. Classification of Matter
Pure
Mixture
Made up of only 1 type of particle
Made up of a combination of different particles
Particles do not chemically combine – remain in original form

8. Heterogeneous (mechanical)
Mixture
Colloid
Heterogeneous (mechanical)
Particles of one substance are held within another substance
Particles will not separate
Ex. Toothpaste
Can see the different substances
Ex. Potting soil, cereal in milk
Suspension
Homogeneous
(solution)
Particles of one substance are held within another substance
-Particles will separate
-Ex. Tomato juice
Appears as if it is all one substance
Ex. Vinegar, air

9. Pure
Compound
Element
Basic building blocks
Cannot be broken down into any simpler substance
Ex. Hydrogen, oxygen
2 or more elements chemically combine in specific proportions
Ex. water (H2O), carbon dioxide (CO2)