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S ix

32. What does the Periodic Table reveal about the Bohr Model? . Time is now up for the Do Now!. One. F ive. Two. Three. Four. minute(s) for Do Now. S ix. For a great stamp: complete, silent, and seated in assigned chair. .

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S ix

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  1. 32. What does the Periodic Table reveal about the Bohr Model? Time is now up for the Do Now! One Five Two Three Four minute(s) for Do Now Six For a great stamp: complete, silent, and seated in assigned chair. DN 32 DN30 CW 30DN 31 CW 31 11/12 Remember to set up your notebook when done. A Day @MrLinehan HW or study questions?

  2. 32. What does the Periodic Table reveal about the Bohr Model? Time is now up for the Do Now! One Five Two Three Four minute(s) for Do Now Six For a great stamp: complete, silent, and seated in assigned chair. DN 31 DN 32DN30 CW 32CW 30DN 31 CW 31 11/12 Remember to set up your notebook when done. B Day @MrLinehan HW or study questions?

  3. Agenda • Do now review • Mastery competition update • Bohr model review: coach-scribe • Cornell notes: the Periodic Table • Practice worksheet • Exit check

  4. The Do Now.Let’s review.

  5. By the end of class… • Produce an image of the Bohr Model of an atom • Use the Bohr Model and the Periodic Table to explain how atoms share electrons • Key vocab: • Period • Group • Valence level • Ion • Cation • Anion

  6. What is the Bohr model? Protons In nucleus Charge of +1 each Neutrons In nucleus No charge Nucleus In middle Net positive charge Electrons Orbit nucleus Charge of -1 each Energy levels The orbits of the electrons Up to 2 electrons in 1st Up to 8 electrons in next Previously covered: D31, D22

  7. Coach-scribe: Draw the Bohr Model • In partners (or threes, if three at table) • Scribe (partner with lowest seat #) will draw the Bohr model • Coach will provide instructions • If there’s a disagreement, the scribe should begin a discussion • Mr. Linehan will only help if the group can’t agree Will be collected & graded for 5 points: • Atomic structure accurate • Includes all five labels from previous slide • Each part drawn with different color • Entire picture is drawn neatly • All names written on back

  8. The Periodic Table Groups Vertical columns Periods Horizontal rows Both are numbered!

  9. The P.T. and the Valence Level Valence level The farthest out energy level in an atom All atoms want to have a full valence level! (Normally 8 electrons.)

  10. The P.T. and the Valence Level The Periodic Table tells you how many valence electrons you start with. 1 8 (except He) 1 Group #: 18 3 4 5 7 6 2 13 14 15 16 17 2 Red = number of valence electrons in that group.

  11. The P.T. and sharing electrons 7 valence electrons 1 valence electron Atoms share electrons to make ions. Ions are atoms that have traded electrons.

  12. The P.T. and sharing electrons -1 Anion Gains electrons More electrons than protons  negative charge Cation Loses electrons More protons than electrons  positive charge

  13. The P.T. and sharing electrons If it starts with three or fewer valence electrons, it will lose them all. If it starts with four, it can gain four or loose four. If it starts with five or more, it will gain to get to 8.

  14. Independent practice.In seven minutes, complete at least five rows on the back of the Do Now individually.If you have questions, first ask a member of your element group. Only ask Mr. Linehan if neither of you knows.

  15. Exit check • Work independently • On a separate piece of paper • Write period # at top • Close notebooks • Counts toward mastery competition • Will an element that gains electrons have positive or negative charge? • Will the element Magnesium (group 2) want to gain or lose electrons? • True/false: a sulfur atom with a full valence shell is a cation.

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