The last two problems in the Chapter 2 assignment has to do with material presented in Chapter 21 of the book. The questions cover sections 21.1 through 21.3, which deals with radioactive decay of isotopes. It would be a good idea to read over those three sections. Also, if you go to the AP Chemistry calendar, there is a link on August 20th for a Power Point that covers the material covered in the three sections of Chapter 21.
I have also supplied a link for a short movie (9 minutes) on YouTube that covers the basics of nuclear decays / reactions. It is old, but does cover all of the basic points of nuclear transmutation / decay very well. Keep the questions coming via email if any of the questions from WebAssign give you problems.
HOLD THE PHONES!! STOP THE PRESSES!! I HAVE FIGURED OUT HOW TO MAKE A QUESTION THAT STUDENTS CAN ANSWER ON WEBASSIGN!! O.k., it is not that big of a deal, but I did figure out how to make an answer block for questions #16 and #17 on the Chapter 2 WebAssign homework. Cross your fingers and hope that it works.
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