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Warm Up

EQ: How has our model of the atom changed over time? HOT Q1: Did you make a Beast Mode on the test? If not, what are you going to do for the next test? HOT Q2: How did Democritus envision “the atom”? HOT Q3: What is our understanding of the atom today?. Warm Up. What is matter?

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Warm Up

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  1. EQ: How has our model of the atom changed over time? • HOT Q1: Did you make a Beast Mode on the test? If not, what are you going to do for the next test? • HOT Q2: How did Democritus envision “the atom”? • HOT Q3: What is our understanding of the atom today? Warm Up • What is matter? • What does a “particle” look like? • Why did Apple create the Iphone 4 when they already created the original Iphone?

  2. Agenda • Warm Up/Objective • Test Return / Tracking • Scientists: Videos • Video: Atomic Structure • Atomic Structure • Exit Ticket

  3. Test Return / Tracking • Averages: • 1st Block: 76.9% • 2nd Block: 92.1% • 3rd Block: 79.0%

  4. No Excuses • http://www.youtube.com/watch?v=obdd31Q9PqA

  5. This is what your test looked like… • http://www.youtube.com/watch?v=1XrzTgvBd6Q

  6. Let’s reflect… 1) For my Unit 3 test, I earned ____%. • When I received my graded test, I felt _________because_____________________. • I think I received this score because • To prepare for this test, I did the following things:

  7. Intro to the Atom • http://www.teachertube.com/viewVideo.php?video_id=105573

  8. Take a pile of paper clips • Divide the pile into two equal piles. • Divide each of the smaller piles into two equal piles. • Repeat step 3 until you are down to a pile containing only one paper clip. That one paper clip still does the job of a paper clip (i.e., hold loose papers together). • Cut that one paper clip in half. Can half of the paper clip do the same job as the single paper clip?

  9. Let’s Take a Trip Through Time!

  10. Notes: Historical Model of the Atom In our TOC… Unit 4: The Atom Notes: Historical Model of the Atom, p.___ On the next clean page of your notebook… Notes: Historical Model of the Atom Date

  11. THOMPSON

  12. Sequence • Democritus • Dalton • Thompson • Rutherford • Bohr • Schrödinger/Heisenberg

  13. Democritus460 – 370 B.C. • First model of an atom!

  14. Pick a Candy!

  15. John Dalton1766-1844 • A given compound always has the same relative numbers and kinds of atoms

  16. Dalton’s Model Pick a Candy !

  17. Pick a Candy!

  18. J.J. Thomson1856-1940 • Discovered electron – Cathode Ray Experiment • Plum Pudding model 1904 • Electrons in a soupof positive charges Video: http://videos.howstuffworks.com/science-channel/29292-100-greatest-discoveries-the-cathode-ray-tube-video.htm

  19. JJ Thomson’s Ideas

  20. Plum Pudding Model Pick a Candy!

  21. Pick a Candy!

  22. Ernest Rutherford1871-1937 • Nucleus Theory 1910 • alpha particle gold foil experiment • An atom’s mass is mostly in the nucleus • The nucleus has a positive charge (Moseley) • Electrons in fixed orbit

  23. Rutherford Video: http://player.discoveryeducation.com/index.cfm?guidAssetId=C313E1E3-D880-4896-B29E-F0815F2E0A61&blnFromSearch=1&productcode=US

  24. Alpha Particle Experiment

  25. Rutherford Model Pick a Candy!

  26. Pick a Candy!

  27. Niels Bohr1885-1962 • Planetary Model 1913 • Nucleus surrounded by orbiting electrons at different energy levels • Electrons have definite orbits • “Thought” experiment

  28. Bohr’s Model

  29. Pick a Candy!

  30. Ernst Schrödinger 1887-1961 Werner Heisenberg 1901-1976 • Quantum Mechanical Model 1926 • Electrons are in probability zones called “orbitals”, not orbits and the location cannot be pinpointed • Electrons are particles and waves at the same time • Developed quantum numbers based on theories of Einstein and Planck

  31. Orbitals

  32. Pick a Candy!

  33. Exit Ticket 1. Experiments with the cathode-ray tube demonstrated that a. atoms are positively charged b. visible light was influenced by a magnetc. a cathode beam consists of negatively charged particles d. atoms contain a nucleus 2. Why did most of the alpha particles go straight through the gold foil in Rutherford’s experiment? a. Most of an atom is empty space. b. Alpha particles are positively charged. c. Alpha particles move with high velocity. d. The center of an atom is positively charged.

  34. Atomic Structure

  35. Essential Questions EQ: What is the structure of an atom? HOT Q1: How does the college credit system work? HOT Q2: What are three subatomic particles? HOW Q3: Are atoms neutral? Warm Up • To the best of your knowledge, what are the parts of an atom? Draw a picture if you like. • What are some spherical objects that have centers which are different from the outside?

  36. College Credits! • Midterm and final Exam (>85%, 10 credits) • Unit Exams (>85%, 5 credits) • Quiz mastery (>85%, 3 credits) • Attendance (2 credits for perfect attendance for whole week) • Peer tutoring (1 credit for excellent peer tutoring) • Participation (1 credit for excellent participation (question or comment) during class) • Classroom Leader Compensation (3 credits/week) • What else do you think should factor into system?

  37. Point breakdown • Honor society = 24 pts • Bachelors Degree= 48 pts • Masters Degree = 72 pts • Doctor of Philosophy in Science= 96 pts

  38. Classroom Leadership Positions

  39. Classroom Leadership Positions

  40. Classroom Leadership Positions

  41. Classroom Leadership Positions **Please note, other positions may be added at a later date. If you do not see a position that suits you, you may suggest a position. If you suggest a position, please offer a clear job description. **If you are selected for a position, you will be required to sign a contract. You will also be given a more detailed description of your duties and responsibilities.

  42. Application Process • Fill out application and return to me Monday, October 3rd • I will be making decision regarding classroom leadership positions by Wednesday, October 5th

  43. Video: Atomic Structure http://player.discoveryeducation.com/index.cfm?guidAssetId=f6b8c2bb-fb87-472d-82d0-f9d21de42161&blnFromSearch=1&productcode=HUB Video Summary:

  44. Consensus Amu = atomic mass unit

  45. PToE • DO NOT LOSE THIS!!!

  46. Atomic Number The number of protons “defines” the element. For example: • hydrogen atoms always contain 1 proton • carbon atoms always contain 6 protons The number of protons in an atom is known as the atomic number. It is the smaller of the two numbers shown in most periodic tables.

  47. More about atomic number If the number of protons changes, then the atom becomes a different element. Changes in the number of particles in the nucleus (protons or neutrons) are very rare. They only take place in nuclear processes such as: • radioactive decay • nuclear bombs • nuclear reactors.

  48. Ordinary atoms are NEUTRAL. They have the same number of PROTONS and ELECTRONS thus, the positive and negative charges are EQUAL, so they cancel each other out

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