_____20. Given the length of the half-life and the amount of time that has passed, I can determine the amount of radioactive sample.
Based on Reference Table N, what fraction of a radioactive sample of Au-198 will remain unchanged after 10.78 days?
1/16 What was the original mass of a radioactive sample of K-37 if the sample decayed to 25.0 g after 4.92 seconds? The half-life of K-37 is 1.23 seconds)
_____24. I can state 5 beneficial uses for radioactive isotopes.
Five beneficial uses for radioactive isotopes are:
a. radioactive dating b. tracing chemical and biological processes c. industrial measurement d. nuclear power e. detection and treatment of disease
_____25. I can state the scientific use of 4 specific radioactive isotopes.
C-14 is used for _____dating previously living organisms_________________
I-131 is used for_____treating thyroid disorders______________________
U-238 is used for ____dating geologic formations___________________
Co-60 is used for______treating cancerous tumors____________________
_____26. I can state three risks associated with radioactivity and radioactive isotopes.
Three risks associated with radioactivity and radioactive isotopes are:
a. biological exposure
_____6. I can classify elements as metals, nonmetals, or metalloids based on their placement on the Periodic Table.
Classify each of the following elements as metals (M), nonmetals (NM), or metalloids (MTLD).
_____7. I can state the group names for elements in groups 1, 2, 17, and 18.
Group 1 is called the ____alkali metals_______________.
Group 2 is called the _____alkaline earth metals__________________.
Group 17 is called the __________halogens__________________.
Group 18 is called the ___________noble gases______________.
_____8. I can explain why elements in the same group have similar chemical properties.
Elements in the same group have similar chemical properties because they have similar electron configurations; same number of valence electrons
_____9. I can explain why the elements in Group 18 don’t usually react with other elements.