Part b- radiometric (isotopic) dating radiometric dating involves using the decay constant of naturally present radioactive materials to date rocks. use the age equation below and your knowledge of radiometric age dating to answer the following questions the age equation where t age of the rock or mineral specimen d = number of daughter product atoms p number of parent atoms a = appropriate decay constant in2 1/2 4) use the equations above to determine the ages of rock units g & d from the table of isotopic measurements on page 266 of your text. (show your work in the space provided below; put a box around your final answer.)