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Chapter 2

Chapter 2. What is Matter?. ResponseWare Login. ResponseCard. Channels: 52. ResponseWare. Not Connected.

sebastian-rowland
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Chapter 2

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  1. Chapter 2 What is Matter?

  2. ResponseWare Login ResponseCard Channels: 52 ResponseWare Not Connected

  3. Channel Setting Instructions for ResponseCard RF1. Press and release the "GO" or "CH" button.2. While the light is flashing red and green, enter the 2 digit channel code (i.e. channel 1 = 01, channel 21 = 21). Channel is 523. After the second digit is entered, Press and release the "GO" or "CH" button. The light should flash green to confirm.4. Press and release the "1/A" button. The light should flash amber to confirm.

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

  5. ATOMS Small Single grain of sand contains 125 million trillion atoms MOLECULES Linked atoms 8oz glass of water contains a trillion trillion H2O molecules Submicroscopic World

  6. Nitrogen • Atom • Molecule

  7. Au is gold on the periodic table • Atom • Molecule

  8. H2O • Atom • Molecule

  9. H2O as ice • Atom • Molecule

  10. H2O as vapor • Atom • Molecule

  11. H2O • Atom • Molecule whether solid liquid or gas

  12. O2 • Atom • Molecule

  13. He (Helium) • Atom • Molecule

  14. CO2 • Atom • Molecule

  15. N2 • Atom • Molecule

  16. N2 • Atom • called a Diatomic Molecule

  17. 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

  18. H2S • Element • Compound

  19. Ne • element • compound

  20. Po • element • compound

  21. H2O2 • Element • Compound

  22. Chemical formulas • Glucose C6H12O6 • Hydrogen peroxide 2 H2O2 • Methane CH4 • Quartz 3 SiO2 • Shows the ratio of atoms used to make a compound

  23. Number of elements in SiO2 • 0 • 1 • 2 • 3

  24. Total Number of atoms in SiO2 • 0 • 1 • 2 • 3

  25. Number of elements in 2 CaF2 Answer = 2: Ca is one and F is the other Total Number of atoms in 2 CaF2two molecules of calcium fluoride Answer = coefficient 2 x one Ca atom  2 + coefficient 2 x 2 atoms of F in F2 + 4 6 atoms

  26. Number of elements in 2 CuCl2 • 0 • 1 • 2 • 3 • 6

  27. Total Number of atoms in 2 CuCl2 • 0 • 1 • 2 • 3 • 6

  28. Number of molecules in 2 H2O2 • 0 • 2 • 4 • 6 • 8

  29. Total number of atoms in 2 H2O2 • 0 • 2 • 4 • 6 • 8

  30. Review from yesterday

  31. 2 C3H8O (isopropyl alcohol) • molecule • atom

  32. How many types of elements in 2 C3H8O (isopropyl alcohol) • 1 • 2 • 3 • 6 • 16 • 12 • 24

  33. How many types of atoms in2 C3H8O (isopropyl alcohol) • 1 • 2 • 3 • 6 • 16 • 12 • 24

  34. How many molecules in2 C3H8O (isopropyl alcohol) • 1 • 2 • 3 • 6 • 16 • 12 • 24

  35. How many total atoms in one molecule of2 C3H8O (isopropyl alcohol) • 1 • 2 • 3 • 6 • 16 • 12 • 24

  36. total number of atoms in 2 C3H8O (isopropyl alcohol) • 1 • 2 • 3 • 6 • 16 • 12 • 24

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

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

  39. Muddy water • pure substance • mixture

  40. Salt water • pure substance • mixture

  41. Isopropyl alcohol, C3H8O • pure substance • mixture

  42. conglomerate • pure substance • mixture

  43. Koolaid • Homogeneous • Heterogeneous

  44. Air • Homogeneous • Heterogeneous

  45. A pail of sand and water • Homogeneous • Heterogeneous

  46. Chocolate syrup • Homogeneous • 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 CO2 to form patina

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