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### Chapter 4: The Structure of the Atom

4.1 Early Theories of Matter
Philosophers - Greek ( fire, earth, air, water, Aristotle, Democritus - atom )
19th Century - John Dalton ( atom ), Alchemy

4.2 Subatomic Particles and the Nuclear Atom
Electron, proton, neutron, cathode ray tube, Millikan, J.J. Thompson, Rutherford
( alpha particle, gold foil ) nucleus, Chadwick ( neutron )

4.3 How Atoms Differ
Atomic number, Moseley
atomic number = # protons = # electrons
isotopes and mass number, atomic mass unit ( AMU )

4.4 Unstable Nuclei and Radioacive Decay
Types of radiation, alpha a ( 2+ ), gamma ? ( no charge ),
beta ß ( 1- )

Homework
##### Section 4.1 Early Theories of Matter
 4/12/2019 Stoichiometry Worksheet - work all problems
##### Section 4.2 Subatomic Particles of Matter
 10/9/2018 Complete the chart on the handout "Atomic Structure" 10/17/2018 p113 60 ab, 61, 64 ab, 65 ab, 68; p114 80; p115 6,7 (5 pts) 4/12/2019 Stoichiometry Worksheet - work all problems 5/2/2019 VIDEO LINK - How to recognize which part of the combined gas law to use for any particular problem
##### Section 4.3 How Atoms Differ
 10/10/2018 p. 99 11 (a,b,c,d), 12, 13. Cornell Notes p100, p101 14 (a,b,c only) 10/11/2018 p 104 15-20 (5 pts) 10/17/2018 p113 60 ab, 61, 64 ab, 65 ab, 68; p114 80; p115 6,7 (5 pts)
##### Section 4.4 Unstable Nuclei and Radioactive Decay
 10/12/2018 Mod Cornell notes p 105-107 (2 red titles, 4 blue titles) 10/15/2018 Practice Problem for Radioactive Decay 19-22 (today's handout) 10/16/2018 Practice Problem for Radioactive Decay 23-27 (today's handout) 10/17/2018 p113 60 ab, 61, 64 ab, 65 ab, 68; p114 80; p115 6,7 (5 pts) 4/12/2019 Stoichiometry Worksheet - work all problems
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