1. Chapter 2 What is Matter?

2. Chemistry Considered a central science because it touches all the other sciences

3. Submicroscopic World ATOMS –Small –Single grain of sand contains 125 million trillion atoms MOLECULES –Linked atoms –8oz glass of water contains a trillion trillion H 2 O molecules

4. Nitrogen a)Atom b)Molecule

5. Au is gold on the periodic table a)Atom b)Molecule

6. H2OH2O a)Atom b)Molecule

7. H 2 O as ice a)Atom b)Molecule

8. H 2 O as vapor a)Atom b)Molecule

9. H2OH2O a)Atom b)Molecule whether solid liquid or gas

10. O2O2 a)Atom b)Molecule

11. He (Helium) a)Atom b)Molecule

12. CO 2 a)Atom b)Molecule

13. N2N2 a)Atom b)Molecule

14. N2N2 a)Atom b)called a Diatomic Molecule

15. ELEMENT –Made of only one type of atom Distinction – elements are made of atoms, and not the other way around COMPOUNDS –Made of 2 or more elements –Every compound’s properties are different than the elements it contains

16. H2SH2S a)Element b)Compound

17. Ne a)element b)compound

18. Po a)element b)compound

19. H2O2H2O2 a)Element b)Compound

20. Chemical formulas GlucoseC 6 H 12 O 6 Hydrogen peroxide 2 H 2 O 2 MethaneCH 4 Quartz3 SiO 2 Shows the ratio of atoms used to make a compound

21. Number of elements in SiO 2 a)0 b)1 c)2 d)3

22. Total Number of atoms in SiO 2 a)0 b)1 c)2 d)3

23. Number of elements in 2 CaF 2 Answer = 2 : Ca is one and F is the other Answer = coefficient 2 x one Ca atom  2 + coefficient 2 x 2 atoms of F in F 2 + 4 6 atoms Total Number of atoms in 2 CaF 2 two molecules of calcium fluoride

24. Number of elements in 2 CuCl 2 a)0 b)1 c)2 d)3 e)6

25. Total Number of atoms in 2 CuCl 2 a)0 b)1 c)2 d)3 e)6

26. Number of molecules in 2 H 2 O 2 a)0 b)2 c)4 d)6 e)8

27. Total number of atoms in 2 H 2 O 2 a)0 b)2 c)4 d)6 e)8

28. Review from yesterday

29. 2 C 3 H 8 O (isopropyl alcohol) 1.molecule 2.atom

30. How many types of elements in 2 C 3 H 8 O (isopropyl alcohol) 1.1 2.2 3.3 4.6 5.16 6.12 7.24

31. How many types of atoms in 2 C 3 H 8 O (isopropyl alcohol) 1.1 2.2 3.3 4.6 5.16 6.12 7.24

32. How many molecules in 2 C 3 H 8 O (isopropyl alcohol) 1.1 2.2 3.3 4.6 5.16 6.12 7.24

33. How many total atoms in one molecule of 2 C 3 H 8 O (isopropyl alcohol) 1.1 2.2 3.3 4.6 5.16 6.12 7.24

34. total number of atoms in 2 C 3 H 8 O (isopropyl alcohol) 1.1 2.2 3.3 4.6 5.16 6.12 7.24

36. PURE SUBSTANCE –Fixed composition –Definite properties Examples –Elements –Compounds Note –Cannot be broken into its components MIXTURE –Varying amounts –No definite properties a.Examples –Air –Stainless steel b.Note –Can be broken into its components

37. MIXTURES Mixtures can be physically separated – NOT chemically combined Heterogeneous –Not evenly distributed –Not uniform Homogeneous –Evenly distributed –Same throughout ________________________ Liquid Mixtures –Miscible: dissolved –Immiscible: does not mix well; layered

39. Muddy water 1.pure substance 2.mixture

40. Salt water 1.pure substance 2.mixture

41. Isopropyl alcohol, C 3 H 8 O 1.pure substance 2.mixture

42. conglomerate 1.pure substance 2.mixture

43. Koolaid 1.Homogeneous 2.Heterogeneous

44. Air 1.Homogeneous 2.Heterogeneous

45. A pail of sand and water 1.Homogeneous 2.Heterogeneous

46. Chocolate syrup 1.Homogeneous 2.Heterogeneous

47. Properties of Matter PHYSICAL –Color –Hardness –Density –Texture –Phase –Mass –Volume –Conductivity –Magnetism Properties can change when conditions change, - BUT still the SAME substance

48. Properties of Matter CHEMICAL –Relates to how a substance reacts Combines Breaks apart – Flammability –Copper reacts with CO 2 to form patina

49. Changes of Matter PHYSICAL CHANGE –Affects one or more physical properties – but not the identity of atoms –Phase change Ex. Melting ice Quartz crushed into sand Dissolving

50. Changes of Matter CHEMICAL CHANGE –Rearrangement of atomic bonds –Chemical reaction occurs –New substance formed

51. Some compounds can be broken down into elements through a chemical change. Detection of change: In odor In color Fizz Heat Sound

52. Bending glass Demo 1.Physical change 2.Chemical change

53. Burning methane with the bunsen burner 1.Physical change 2.Chemical change

54. Distilling wood 1.Physical change 2.Chemical change

55. Distilling liquids left after distilling the wood 1.Physical change 2.Chemical change

56. Melting ice 1.Physical change 2.Chemical change

57. Freezing water 1.Physical change 2.Chemical change

58. Melting moth nuggets or flakes 1.Physical change 2.Chemical change

59. Freezing moth nuggest and flakes 1.Physical change 2.Chemical change

60. Cooking an egg 1.Physical change 2.Chemical change

61. Painting wood 1.Physical change 2.Chemical change