1. Q: What is the dullest element? A: Bohrium

2. Key concepts: Describe 3 properties of mixtures Describe and identify the 3 types of mixtures by their properties Describe the Tyndall Effect Give everyday examples of mixtures

3. Key Vocabulary: Mixture Heterogeneous Homogeneous Suspension Colloid Solution

4. Imagine a world of legos: Make up compounds and mixtures:

5. Matter MixturePure Substance Element Compound Heterogeneous Mixture Homogeneous Mixture Can be separated physically Cannot be separated physically Can see the parts Cannot see the parts Can be separated chemically Cannot be separated Most impure Most pure

6. Summary: 1.What is the difference between pure and impure substances? 2.What is differences between an solution, colloid and suspension? 3.What are some everyday examples of each type of mixture

7. Mixtures: A mixture is a combination of two or more substances that are not chemically combined. Think about trail mix or a pizza… – Can you taste the tomato pasta? Meat? You can separate mixtures physically. – What about compounds? What does pure mean? How is this different from an compound? What are some examples of chemical and physical changes?

9. Types of Mixtures: Heterogeneous—you can easily see the particles; may have to use a microscope – Suspension: visible particles settle (you can see them) Homogenous—contain 2 or more substances that are blended evenly throughout (you can’t see the particles) – Solution: mixture that never settles and can’t be seen with a microscope – Colloid: mixture with larger particles than a solution but still small enough that they don’t settle out

10. Tyndall Effect: Tyndall Effect: the scattering of light by colloidal particles – Link Link

11. TYPES IN GREAT DETAIL:

12. Solutions: – Particles are so small NEVER settle out due to how small they are Make sure that you know what an alloy is.. Know the differences between solutions and colloids

13. Colloids: Colloid: – A mixture in which the particles are dispersed throughout but are not heavy enough to settle out. – Small and mixed well but not as good as solution – Can’t be filtered but scatter light (the particles) – Examples: Milk, mayo, and deodorant What is a colloid?

14. Suspension: – A mixture in which the particles are dispersed throughout and are heavy enough to settle out. – Scatter and block light Dirty lake water – Can be filtered – Examples: Salad dressing, medicines, paint What is a suspension? This snow globe contains solid par- ticles that will mix with the clear liquid when you shake it up. But the particles will soon fall to the bottom when the globe is at rest.

15. Review: How do mixtures differ from elements and compounds? How can mixtures be separated?

16. Homework: Vocabulary cards for the following term: – Mixture Vocabulary cards for the following term: – Mixture Q-tips says, “Q: Why do chemists call helium, curium and barium the medical elements? A: Because if you can't helium or curium, you barium!