1. Elements An ___________is a substance that contains only a singe type of ________. The __________of atoms does not matter as long as they are all the same type. Elements ___________be separated into other substances. – Examples: gold, silver, helium, oxygen

2. Compounds A _______________is a substance that consists of two or more different types of atoms ___________together. – Example: Table salt is a compound because it is made of sodium and chlorine.

3. Mixtures A __________is a combination of different substances that remain the same individual substances and can be separated by ____________means. – Example: A bowl of apples, oranges, and bananas can be separated by physically removing them from the bowl. Pictures from Chem 4 kids

4. Comparing Mixtures and Compounds Mixtures Compounds

6. Parts of a Mixture Homogenous Mixtures – when substances are _______spread throughout a mixture. – Examples: mixing sugar into a cup of water, homogenized milk Heterogeneous Mixtures – when substances are _______evenly spread throughout a mixture – Examples: soil, salsa

7. Homogeneous Mixture “ Homo ” means the same has the same uniform appearance and composition throughout; maintain one phase (solid, liquid, gas) Commonly referred to as solutions Example: Salt Water Notice the uniform appearance

8. Solution a mixture of two or more substances that is identical throughout can be physically separated composed of solutes and solvents the substance in the smallest amount and the one that dissolves in the solvent the substance in the larger amount that dissolves the solute Colloids (milk, fog, jello) are considered solutions. Particles are microscopically dispersed. Iced Tea Mix (solute) Water (solvent) Iced Tea (solution) Salt water is considered a solution. How can it be physically separated?

9. Colloids (heterogeneous) A colloid is a mixture where very small particles of one substance are evenly distributed throughout another substance. They appear very similar to solutions, but the particles are suspended in the solution rather than fully dissolved. The difference between a colloid and a suspension is that the particles will not settle to the bottom over a period of time, they will stay suspended or float.

10. Heterogeneous Mixture “ Hetero ” means different consists of visibly different substances or phases (solid, liquid, gas) a suspension is a special type of heterogeneous mixture of larger particles that eventually settle Example: Trail Mix Notice the visibly different substances

11. Suspensions Properties Suspensions separate into layers over time Particles are larger than those in a solutions Examples: Sand in water, muddy water, salad

12. Homogenous or Heterogeneous?

16. Element, Compound, or Mixture? Copper

17. Element, Compound, or Mixture? Copper

18. Element, Compound, or Mixture? Rocks

19. Element, Compound, or Mixture? Rocks

20. Element, Compound, or Mixture? Jelly Beans

21. Element, Compound, or Mixture? Jelly Beans

22. Element, Compound, or Mixture? Table Sugar

23. Element, Compound, or Mixture? Table Sugar

24. Element, Compound, or Mixture? Diamond

25. Element, Compound, or Mixture? Diamond

26. Element, Compound, or Mixture? Tea

27. Element, Compound, or Mixture? Tea

28. Element, Compound, or Mixture? Salt

29. Element, Compound, or Mixture? Salt

30. Element, Compound, or Mixture? Neon Gas

31. Element, Compound, or Mixture? Neon Gas

32. Element, Compound, or Mixture? Salad

33. Element, Compound, or Mixture? Salad

34. Element, Compound, or Mixture? Pure Water

35. Element, Compound, or Mixture? Pure Water

36. Element, Compound, or Mixture? Aluminum

37. Element, Compound, or Mixture? Aluminum

38. Element, Compound, or Mixture? Lemonade

39. Element, Compound, or Mixture? Lemonade

40. Element, Compound, or Mixture? Silver

41. Element, Compound, or Mixture? Silver

42. Element, Compound, or Mixture? Sand

43. Element, Compound, or Mixture? Sand