HW - 10B/C

posted Mar 9, 2015, 6:59 AM by Ms. Laryssa Kramarchuk   [ updated Mar 9, 2015, 6:59 AM by FMHS Web Admin ]
1. Complete all the discussion questions and extension questions, even the ones originally you were told not to do. 

Discussion Questions

1.  Did the Twizzler-ium ever completely disappear? Explain.

 

2.  Compare and describe the two graphs. How are they similar? How are they different?

 

3.  What was the half-life of the Twizzler-ium?

 

4.  If you had started with a GIANT Twizzler-ium (2x the normal size) how would this have affected the shape of your second graph? Explain.

 

5.  Describe the effect on the graphs if you took a bite every 90 seconds.

 

Extension Questions

1.  Write a balanced nuclear equation for beta emission from phosphorus-32.

 

2.  If 50% of a radioactive element remains after 4000 years, what is the half-life?

 

3.  The half-life of a certain radioactive element is 1250 years. What percent of the atoms remain after 7500 years?

 

4.  The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of the radioactive atoms in it remain?

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