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First Woman Flies Across the Atlantic ( 1928)

First Woman Flies Across the Atlantic ( 1928). Reading: Chapter 4 sections 6-end (quiz) HW #4.1: DUE Thursday 9-13 (all), 17, 19, 20, 23, 25, 29, 31, 35, 37, 42, 46, 51, 53 HW # 4.2: DUE Monday 59, 60, 65-79 (all), 83, 84, 85, 89, 94, 95, 99, 101, 103, 106

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First Woman Flies Across the Atlantic ( 1928)

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  1. First Woman Flies Across the Atlantic (1928) • Reading: Chapter 4 sections 6-end (quiz) • HW#4.1: DUE Thursday • 9-13 (all), 17, 19, 20, 23, 25, 29, 31, 35, 37, 42, 46, 51, 53 • HW #4.2: DUE Monday • 59, 60, 65-79 (all), 83, 84, 85, 89, 94, 95, 99, 101, 103, 106 • For lab tomorrow (dry lab) • EXAM TOMORROW • Ions and elements • Chapter 2 - …

  2. My Atom Broke • Subatomic Particles • Outside the nucleus • Electrons – e- • Carry a single negative charge • 1/1900th the size of p+ and no • Responsible for most of the chemistry that ever happens

  3. Atoms vs. Ions • Atoms are NEUTRAL!!!!! • This means that they have zero charge • #p+ = #e-

  4. My Atom Broke • Subatomic Particles • Nucleus • Neutrons – no • No charge • # can vary from atom to atom

  5. Mass of no about equal to mass of p+ Do each of these atoms have the same mass? Isotopes: Atoms having the same atomic number, but different atomic masses

  6. Atom notation Mass number = # p+ + # no A Symbol of element E S 16 Z Atomic number

  7. 32 A S E 16 Z 33 S 16 32 S 16 34 S 16 Sulfur-33 Shorthand: S-36 36 S 16 36S

  8. 208 82 p+ + 126 no = Pb Give the atom notation for the following: 1) an atom with 82 p+ and 126 no 2) an atom of iron with 28 no 3) an atom of element 29 having 34 no 82 54 Fe 26 63 Cu 29

  9. 83Bi 83 209 83 126 83 209 53I 53 127 53 74 53 127 24Cr 24 53 24 29 24 53

  10. Information from the Periodic Table (atomic number) 20 = = 40.08 amu (atomic mass) (atomic number) 8 = = 16.00 amu (atomic mass)

  11. Atomic Masses • Measured in the unit amu • Stands for atomic mass unit • Defined as 1/12th the mass of a 12C atom • 35Cl = 34.9689 amu • 50V = 49.9472 amu • 79Br = 78.9183 amu • Are these what the P.T. say?

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