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September 16, 2013

September 16, 2013 When the bell rings voices are at zero, working on the DO NOW ( All electronics away!!) Pick up daily handouts Turn in – M&Ms Lab Report Due Today (LATE Beanium ClEvR , LATE Anticipation guides, Lab safety contracts)

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September 16, 2013

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  1. September 16, 2013 • When the bell rings voices are at zero, working on the DO NOW ( All electronics away!!) • Pick up daily handouts • Turn in – M&Ms Lab Report Due Today (LATE BeaniumClEvR, LATE Anticipation guides, Lab safety contracts) • Start on the Do Now in your Do Now form ( flip over your’s from last week) DO NOW 9/16/13 The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed? WHEN YOU FINISH YOUR DO NOW TAKE EVERYTHING YOU WILL NEED OUT OF YOUR BACKPACK AND PUT AT ENTRANCE

  2. Do Now Review DO NOW 9/16/13 The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed? 7.2 / 2.4 = 3 half-lives (1/2)3 = 0.125 (the amount remaining after 3 half-lives) 100.0 g x 0.125 = 12.5 g remaining

  3. Homework Lab Report for Chemistry in a bag Due Friday 9/20/2013 ** ( Cover Letter, Introduction, and Hypothesis) Bohr Model Article and Questions Due Tomorrow Tuesday 9/21/2013 Grading Policy***

  4. Upcoming Dates • 9/18/2013 Wednesday Nuclear Chemistry Test • 9/20/2013 Mole Conversion test • 9/20/2013 Chemistry in a bag report due

  5. Tutoring • Tuesday 2:30-3:30 in room 529 • Thursday 2:30-3:30 in room 710

  6. Nuclear Chemistry Bravo – 15,000 kilotons

  7. Nuclear Symbols Element symbol Mass number (p+ + no) Atomic number (number of p+)

  8. Types of Radioactive Decay • alpha production (a, He): helium nucleus • beta production (b, e): • gamma ray production (g):

  9. NuclearStability Decay will occur in such a way as to return a nucleus to the band (line) of stability.

  10. Alpha Radiation Alpha decay is limited to VERY large, nuclei such as those in heavy metals.

  11. Beta Radiation Beta decay converts a neutron into a proton.

  12. Practice! Alpha decay or iridium-174 Beta decay of platinum-199 Krypton-76 undergoes electron capture

  13. Chemistry in a Bag! • Kevin, Victoria, Breion • Alexis, Nalexus, Hunter, Linda • Atianna, Sydney, Yusef, Deja • Miranda, Jordan H, Simone, Jordan L • Kalen, Andre, Jaylen, Bryanna

  14. Chemistry in a Bag! • Jon, Jaquis, Cameron • Darryl, Leon, Chris • Treyeln, Kirkland, Angel • Dorian, Mandrez, Garrett

  15. Chemistry in a Bag! • Farrukh, Malik B, Yin, Miles • Alexis, Malik S, Jonathan • Brianna D, Kris, Andrea • Sydney, Quand’Arius, Brionna R • Beni, Bryt’Tani, Qualaizuyia • Shawn, Tavon, Daenejia

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