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Thursday 2-27-14

Thursday 2-27-14. WU Check Metals/Nonmetals/ Metalloids (Colored Periodic Table will be BIG portion of your notebook check next week) Bohr Model Notes Understanding Periodic Table WS Building Bohr Model WS. Thursday 2-27-14. WU: Name each of the following elements.

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Thursday 2-27-14

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  1. Thursday 2-27-14 • WU • Check Metals/Nonmetals/ Metalloids (Colored Periodic Table will be BIG portion of your notebook check next week) • Bohr Model Notes • Understanding Periodic Table WS • Building Bohr Model WS

  2. Thursday 2-27-14 WU: Name each of the following elements. (Use your notes & colored periodic table!) • Alkaline Earth metal with 6 energy levels • Liquid Halogen • The 2 most reactive elements in the 3rd period.

  3. Barium Bromine Sodium and Chlorine • Alkaline Earth metal with 6 energy levels • Liquid Halogen • The 2 most reactive elements in the 3rd period. Alkaline Earth Metals Halogens Most Reactive Metals Most Reactive NonMetals

  4. Thursday 2-27-14 • Check Metals/Nonmetals/ Metalloids (Colored Periodic Table will be BIG portion of your notebook check next week) • Bohr Model Notes • Understanding Periodic Table WS • Building Bohr Model WS

  5. How to Draw a Bohr model • Start at the center of the atom • Write in number of protons and neutrons for atom • Protons (p+) = • Neutrons (n0) = • Add the right # of electrons • Electrons (e-) = • Add electrons starting in center ring and progress outwards as the rings fill up until you have the right number of electrons. • Use the periodic table to guide you • There needs to be an electron for each atom that comes before the atom you are drawing. Atomic # p+ n0 e- Atomic mass – atomic # Same # as protons

  6. The # of electrons in each energy level is equal to the number of elements in that row. The first energy level can have ___ electrons because there are ___ elements in that row. 2 2 p+ n0 e- e-

  7. The 2nd & 3rd energy level can have ___electrons because there are __ elements in that row. 8 8 p+ n0 e- e- e- e- e- e- e- e- e- e-

  8. The 4th & 5th energy level can have ___ electrons because there are __ elements in that row. 18 18

  9. Rows 6 & 7 include the pieces at the bottom of the periodic table (lanthanide and actinide series) So they each contain ___ electrons in that level. 32

  10. Remember: The # of electrons for each energy level is equal to the number of elements in that row on the periodic table What belongs in the center of the atom? How many atoms in first row of periodic table? 2nd row? p+ n0 3rd row? 2e- 8e- 8e- 4th row? 18e- 5th row? 18e- 6th row? 32e- 7th row? 32e-

  11. But not all those electrons are on the outside of the atom (valence e-) The # of valence electrons can be determined by the column the element is found in on the periodic table.

  12. Write the # of Valence electrons at the top of each column (last p.) All atoms in the family have the same # valence electrons (with the exception of Helium) How many valence electrons will Helium have? 2 Why? First ring contains only 2 electrons How many valence electrons will Fluorine have? 7

  13. How many energy levels will Helium have? 1 How many energy levels will Fluorine have? 2

  14. Structure Of The Atom Now lets draw an atom of chlorine: Atomic Number = 17 Atomic Mass = 35 Protons = 17 + 0 Atomic Mass - protons Neutrons = 18 Electrons = 17 Energy Levels = 3 Valence electrons = 7 Bohr model=

  15. 11p+ 12 n0 Now Do Sodium • Atomic # • Mass # • Protons • Neutrons • Electrons • # energy levels • # valence electrons • Draw it = 11 = 23 = 11 = 12 = 11 = 3 = 1

  16. To Do: • Understanding Periodic Table WS • Building a Bohr Model WS

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