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ConcepTest: Change in Porportion of Parent Isotopes Over Time

ConcepTest questions by David McConnell , David Steer , Walter Borowski, Jeffrey Dick, Annabelle Foos, Jeffrey Knott, Alvin Konigsberg, Michelle Malone, Heidi McGrew, Kathie Owens, and Stephen Van Horn

Question:

Which graph below best represents the change in the proportion of unstable (parent) radioactive isotopes with time?

Parent Isotope Porportion Graph

a. A
b. B
c. C
d. D

Student Responses:

No data yet. The correct response is a.

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References and Notes: