Question 1
Find a correct technique used in radiometric dating.
◦ uranium-238 to bismuth-206
◦ potassium-40 to argon-40
◦ carbon-14 to nitrogen-11
◦ calcium-41 to argon-42
◦ lead-206 to uranium-238
Question 2
Which of the following equations shows the correct relationship between the half-cell of a nuclide and the radioactive decay rate constant?
◦
t1/2 = 0.693 ×
k◦
t1/2 =

◦

= - ln

◦
t1/2 =

◦ ln

= -