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# 2013-14 Chapter 2 Notes

## on Aug 29, 2013

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## 2013-14 Chapter 2 NotesPresentation Transcript

• Chapter 2 1Thursday, August 29, 13
• Chapter 2 2Thursday, August 29, 13
• Chapter 2 3Thursday, August 29, 13
• Democritus 4Thursday, August 29, 13
• Plato & Aristotle 5Thursday, August 29, 13
• Plato & Aristotle Plato (da Vinci) Aristotle 6Thursday, August 29, 13
• Plato & Aristotle 7Thursday, August 29, 13
• Plato & Aristotle 8Thursday, August 29, 13
• Dark Ages 9Thursday, August 29, 13
• John Dalton 10Thursday, August 29, 13
• Conservation of Mass Review Question: A car weighs 1000.0 kg. The tank is filled with 20.000 kg of gasoline (C8H18), so the total mass of the car plus the gas is 1020.0 kg. The car is driven until the tank is empty, and the car again weighs 1000.0 kg. How much do the exhaust gases given off during the drive weigh? a. Much less than 20.0 kg. b. A bit less than 20.0 kg. c. Exactly 20.0 kg. d. A bit more than 20.0 kg. e. Much more than 20.0 kg. EXPLAIN... 11Thursday, August 29, 13
• Volume? 12Thursday, August 29, 13
• JJ Thomson (1897) Discovered charge/mass ratio = 1.76 x 108 C/g (1 C = 1 ampere•sec = 1 kg•m•sec = 1 F•V) 13Thursday, August 29, 13
• JJ Thomson (1897) 14Thursday, August 29, 13
• JJ Thomson (1897) 15Thursday, August 29, 13
• Robert Millikan (1909) Discovered charge on electron = 1.602 x 10-19 C What’s the mass of an electron? 16Thursday, August 29, 13
• Becquerel, Curie & Curie 17Thursday, August 29, 13
• Thomson & Rutherford 18Thursday, August 29, 13
• Gold Foil Experiment 19Thursday, August 29, 13
• Gold Foil Experiment 20Thursday, August 29, 13
• Gold Foil Experiment “BBC” Movie... 21Thursday, August 29, 13
• Rutherford’s Work Revealed Alpha Particles Beta Particles Gamma Rays 22Thursday, August 29, 13
• Modern View of the Atom Proton = 1 amu, +1 charge, nucleus Neutron = 1 amu, 0 charge, nucleus Electron = 1/1836 amu, -1 charge, cloud Size? 1-5 angstroms (100-500 pm) 73 million Cu atoms sit across penny 23Thursday, August 29, 13
• Modern View of the Atom Examples—mass #, atomic #, p+, n0, e- Where do we ﬁnd this info? 24Thursday, August 29, 13
• Periodic Table Mosley & Mendeleev 25Thursday, August 29, 13
• Periodic Table Groups/Families Know page 53-54 Periods/Rows MUCH more on this later... 26Thursday, August 29, 13
• IONIC V. COVALENT 27Thursday, August 29, 13
• NAMING Binary Molecular—page 59 Ionic—page 60-63 Acids—page 64-66 A little hint for naming acids… Hide-and-go-seek in the water is terrific. anion = chloride, then hydrochloric acid I felt icky after I ate anion = chlorate, then chloric acid With all my mite I chased the mouse. anion = chlorite, then chlorous acid -By Holly Weis 28Thursday, August 29, 13