1. Properties of Matter Ch 2

2. What is matter? Anything that has mass and takes up space Anything that has mass and takes up space The basic building blocks of matter are atoms- the smallest particle of an element The basic building blocks of matter are atoms- the smallest particle of an element Matter can be classified as pure substances or mixtures Matter can be classified as pure substances or mixtures

3. Pure Substances Matter that always has the same composition Matter that always has the same composition Ex: table salt- each pinch of salt tastes the same Ex: table salt- each pinch of salt tastes the same Pure substances have a fixed, uniform composition Pure substances have a fixed, uniform composition Pure substances are categorized as elements or compounds

4. Elements A substance that cannot be broken down any further A substance that cannot be broken down any further No two elements contain the same type of atom No two elements contain the same type of atom Where can we find elements listed? Where can we find elements listed? Examples: Examples:

5. Elements cont. Elements are represented by symbols on the periodic table Elements are represented by symbols on the periodic table Symbols are one or two letters Symbols are one or two letters First letter is always CAPITALIZED, second letter is always lowercase First letter is always CAPITALIZED, second letter is always lowercase Where did these symbols come from? Where did these symbols come from?

6. Compounds A substance made up of 2 or more elements and can be broken down into simpler substances A substance made up of 2 or more elements and can be broken down into simpler substances The properties of a compound differ from the properties of the elements that make it up The properties of a compound differ from the properties of the elements that make it up H 2 O made up of hydrogen and oxygen H 2 O made up of hydrogen and oxygen Examples: Examples:

7. Mixtures A blend of 2 or more substances, each retaining their own characteristics A blend of 2 or more substances, each retaining their own characteristics Can usually be separated by physical means Can usually be separated by physical means The composition of a mixture is not fixed The composition of a mixture is not fixed Mixtures can be heterogeneous or homogeneous Mixtures can be heterogeneous or homogeneous

8. Types of mixtures Heterogeneous Heterogeneous Hetero - different Hetero - different The parts of a mixture are noticeably different from one another The parts of a mixture are noticeably different from one another Ex: sand Ex: sand Homogeneous homo – same Substances are so evenly distributed, it is hard to distinguish one from the other Appears to contain only one substance Ex: swimming pool water, stainless steel

9. Solutions, Suspensions and Colloids The size of the particle in a mixture has an effect on the properties of a mixture The size of the particle in a mixture has an effect on the properties of a mixture Based on the size of its largest particle, a mixture may be classified as a solution, suspension or colloid Based on the size of its largest particle, a mixture may be classified as a solution, suspension or colloid Read the pg 42-43, fill in the table on your worksheet Read the pg 42-43, fill in the table on your worksheet

10. What is it? Particle size Can it be separated ? How? Examples Solution Suspension Colloid p229 look up and define: Solvent Solute

11. Solution What is it? Particle size Can it be separated ? How? Examples Solution

12. Suspension What is it? Particle size Can it be separated ? How? Examples Suspension

13. Colloid What is it? Particle size Can it be separated ? How? Examples Colloid