100610 chem a gall

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100610 chem a gall

  1. 1. <ul><li>Do Now: Look at your Notebook. If pages are not hole-punched and placed in the binder, do that; Portfolios are collected today. </li></ul><ul><li>Homework: Finish 2 assigned atom models, due Friday. </li></ul><ul><li>AIMS: TLW continue to apply knowledge of phase changes, kinetic energy, and the structure of the atom. </li></ul>
  2. 2. <ul><li>Silently complete Do Now (compile portfolio). Turn in portfolio today, returned on Friday. Copy homework. </li></ul><ul><li>Review Lesson Steps. </li></ul><ul><li>Please draw a diagram and describe the process of carbon dioxide solid (dry ice) subliming to form gaseous carbon dioxide- inside a sealed container. Classwork due today. </li></ul><ul><li>Discuss Homework due today: </li></ul><ul><ul><ul><ul><li>Pg. 122 #47-51 </li></ul></ul></ul></ul><ul><li>Atomic models- notes </li></ul><ul><li>Homework assigned: </li></ul><ul><ul><li>Males: Li, F </li></ul></ul><ul><ul><li>Females: Ne, B </li></ul></ul>
  3. 4. <ul><li>47. The atomic number is the number of protons in the atom. </li></ul><ul><li>48. How many protons are in the nucleus: </li></ul><ul><ul><li>phosphorus: 15 </li></ul></ul><ul><ul><li>molybdenum 42 </li></ul></ul><ul><ul><li>aluminum 13 </li></ul></ul><ul><ul><li>cadmium 48 </li></ul></ul><ul><ul><li>chromium 24 </li></ul></ul><ul><ul><li>lead 82 </li></ul></ul>
  4. 5. <ul><li>49. What is the diff. betw. the mass # and atomic # in an atom? </li></ul><ul><li>The atomic number is the number of protons. The mass number is the average sum of the protons and neutrons. </li></ul><ul><li>For example, Hydrogen has an atomic number of one because it has one proton. Hydrogen only SOMETIMES has a neutron... The average mass of a hydrogen atom is 1.0079 amu. </li></ul>
  5. 6. atomic number = 2 atomic mass = 4 Element: Helium Symbol: He
  6. 7. Atomic number Mass number Number of protons Number of neutrons Symbol of element 9 19 9 10 F 14 29 14 15 Si 22 47 22 25 Ti 25 55 25 30 Mn
  7. 8. <ul><li>51. Two isotopes differ from each other in the number of neutrons and also in the atomic mass. They have the same number of protons. </li></ul><ul><li>example: H, Hydrogen, and Deuterium, Which is an atom of Hydrogen with an atomic mass of 2 amu. </li></ul><ul><li>Hydrogen: 1 proton, 1 electron, NO neutrons </li></ul><ul><li>Deuterium : 1 proton, 1 electron, 1 neutron </li></ul>
  8. 9. <ul><li>Place RED DOTS on the model to represent PROTONS. </li></ul><ul><li>Place BLACK DOTS on the model to represent NEUTRONS. </li></ul><ul><li>Place GREEN DOTS on the model to represent ELECTRONS. </li></ul><ul><li>Homework assigned: </li></ul><ul><ul><li>females: Li, F-1 </li></ul></ul><ul><ul><li>males: Ne, B+2 </li></ul></ul>

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