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093010 chem a
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2. Thursday, September 30, 2010 DO NOW: What shape did the Greeks imagine the ATOM would be? HOMEWORK: List the first twenty elements with their names, symbols, atomic numbers, and atomic masses. (Use the periodic table in your book) AIM: TLW discuss the historical development of the theory of the atom and, using inquiry, find the need for such a concept. TLW begin to form a concept of the modern model of the atom.
4. SMALLEST PIECE OF PAPER?!! CONTEST: Who can find/ create the smallest piece of paper? QUESTION: If you catch the paper on FIRE, then take the smallest ash- is THAT still paper? (students: NO- It’s ash!) If I put the paper in water so it turns into mush then pull the fibers apart, is each fiber still paper? The Greeks figured at some point you can’t divide matter any smaller...
5. Lesson Steps Silently complete the Do Now and copy the homework. Discuss Do Now Review Lesson Steps. Homework is due: pg. 103 #1-7 Contest: smallest piece of paper Bookwork Page 108 # 8-14; copy the caption from Figure 4.7 (page107); pg. 111 #15- 16; pg. 112 #17, 18; pg. 113 #19, 20; pg. 116 #21,22; pg. 117 #23, 24; pg.119 #25 – 33. ORListen and participate in a lecture- notes optional – and take a brief post-test. Homework is due tomorrow.
6. Is there anything smaller an atom? ions – charged atoms neutron- small particle from nucleus of atom electrons quarks photon(particle/ wave of light; practically massless)
7. Post- test questions... What is the plum pudding model of the atom? draw a picture. What is the Rutherford (gold- foil experiment) model of the atom? draw a picture. How can I find the number of protons in an atom? How can I tell which element an atom is? How can I tell how many electrons are in a neutral atom of an element? How can I tell how many neutrons are in a typical atom of an element? What is an isotope? Who is Dmitri Mendeleev?
8. post- quiz How many protons are in a hydrogen atom? How many neutrons are in a hydrogen atom? How many electrons are in a hydrogen atom? What is bigger, a proton or an electron? What is the charge of an electron?
