1. How We Got To Where We Are Now!!

2. 1. List 5 major atomic theorists 2. If possible, give a piece of equipment or experiment for which they are noted 3. Draw their model of the atom 4. List 3 basic laws of chemistry that were used to help develop the atomic theory

3. Hint #1. When you don't know what you are doing, do it neatly.

4. Who: Democritus When: 400 B.C. Where: Greece What: Matter was made of indivisible substances he called atomos (1 st talk of the atom)

5. What: All matter is a combination of fire, air, earth or water When: 350 B.C. Where:Greece Who: Aristotle

6. Who: Antoine Lavoisier Matter can't be created or destroyed When: 1785 Where: France

7. Who: Joseph Proust What:Elements – Compounds put together in fixed ratios of small whole numbers ex. C + O 2  CO 2 When: 1797 Where: France

8. Happy Birthday, Happy Birthday, So you’ve aged another year. Now you know that Death is near. Happy Birthday, Happy Birthday!

9. Who: John Dalton What:Two elements can form more than one compound The subscripts of the elements in the compounds will be small whole numbers. C + O 2  CO 2 C + O 2  CO Where: England When: 1803

10. 2 2.1

11. What: Solid Sphere Model (1 st atomic theory) 1. Matter is composed of indivisible particles 2. All atoms of a particular element are identical 3. Different elements have different atoms 4. Atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements. Who: John Dalton

12. 8 X 2 Y 16 X8 Y + 2.1

13. Problems with Dalton’s Theory

14. 1. Matter is composed of indivisible particles Atoms can be divided, but only in a nuclear reaction 2. All atoms of a particular element are identical Does not account for isotopes (atoms of the same element but a different mass due to a different number of neutrons)! 3. Different elements have different atoms Yes! 4. Atoms combine in certain whole-number ratios Yes! Called the Law of Definite Proportions 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements. Yes, except for nuclear reactions

15. Remember to make clear and concise statements with your observations!!!

16. What: Atoms are not the smallest particle Conducted experiment with a Cathode Ray Tube Particles had a negative charge (discovered electrons) Model = plum pudding jello fruit salad When: 1897 Where: England Who: J.J. Thomson

17. Cathode Ray Tube

18. J.J. Thomson, measured mass/charge of e - (1906 Nobel Prize in Physics)

19. 2.2

20. Questions about teenage men answered by teenage women!!! Q: Why do little boys whine? A: They are practicing to be young men.

21. What: Experiments to determine mass of electron Conducted the oil drop experiment Verified that electron is negatively charged; 1.6 x 10 -19 coulombs No new model Where: America When: 1910 Who: Robert Millikan

22. Millikan’s Oil Drop Experiment

23. e - charge = -1.60 x 10 -19 C Thomson’s charge/mass of e - = -1.76 x 10 8 C/g e - mass = 9.10 x 10 -28 g Measured mass of e - (1923 Nobel Prize in Physics) 2.2

24. A prayer for her teenage boyfriend by a teenage young woman!!! Dear Lord, I pray for Wisdom to understand my guy; Love to forgive him; and Patience for his moods. Because, Lord, if I pray for Strength, I'll beat him to death!!!!

25. What: Conducted Gold Foil experiment Proved nucleus is dense, positively charged core of atom When: 1911 Where: America Model = Stationary Planetary

26. Gold Foil Experiment

27. 1.atoms positive charge is concentrated in the nucleus 2.proton (p) has opposite (+) charge of electron 3.mass of p is 1840 x mass of e - (1.67 x 10 -24 g)  particle velocity ~ 1.4 x 10 7 m/s (~5% speed of light) (1908 Nobel Prize in Chemistry) 2.2

31. atomic radius ~ 100 pm = 1 x 10 -10 m nuclear radius ~ 5 x 10 -3 pm = 5 x 10 -15 m Rutherford’s Model of the Atom 2.2

32. A little known fact concerning teenage boyfriends!!! While creating man, God promised women that good and ideal boyfriends would be found in all corners of the world...............then He made the earth round.

33. What: Pulsating Planetary Model Electrons can move between energy levels When: 1913 Where: Denmark

34. What: Confirmed existence of neutron No new atomic model When: 1932 Where: England

35. H atoms - 1 p; He atoms - 2 p mass He/mass H should = 2 measured mass He/mass H = 4  + 9 Be 1 n + 12 C + energy neutron (n) is neutral (charge = 0) n mass ~ p mass = 1.67 x 10 -24 g 2.2

36. Interesting Name for a Boat!!

37. 1. List 5 major atomic theorists 2. If possible, give a piece of equipment or experiment for which they are noted 3. Draw their model of the atom 4. List 3 basic laws of chemistry that were used to help develop the atomic theory

38. Get Your Clicker!!!

39. 1.Aristotle 2.John Dalton 3.J J Thomson 4.Ernest Rutherford 5.Democritus

40. 1. Solid Sphere Model 2. Stationary planetary model 3. Plum pudding model 4. Pulsating orbital model

41. 1. Law of conservation of mass 2. Law of definite proportions 3. Law of multiple proportions

42. 1. Neils Bohr 2. John Dalton 3. J J Thomson 4. Ernest Rutherford 5. Millikan

43. 1. Aristotle 2. John Dalton 3. J J Thomson 4. Ernest Rutherford 5. Democritus

44. 1. Neils Bohr 2. John Dalton 3. J J Thomson 4. Ernest Rutherford 5. Millikan

45. 1. Solid Sphere Model 2. Stationary planetary model 3. Plum pudding model 4. Pulsating orbital model

46. WHY GOD MADE MOMS Answers given by 2nd grade school children to the following questions: Why did God make mothers? 1. She's the only one who knows where the scotch tape is. 2. Mostly to clean the house. 3. To help us out of there when we were getting born.

47. Draw 4 historical models of atoms on a time-line. The correct model is one point, the correct name or person of the model is one point and the correct approximate time on the line is one point. The Atom Historical Models Family Feud

48. Part of Atom Size (Tennis B, Base B, Nerf B) Mass (Heaviest, Lightest, Middle) Distance from Center (meters) Proton Neutron Electron The Modern Atom Family Feud