How do scientists use radioactive decay to date fossils and artifacts

An example of technology is the a. addition of a side group to an organic molecule during synthesis. b. use of a new antibiotic to fight an infection. c. measurement of iron concentration in a water sample. d. study of atomic fusion reactions

Which subshell is represented by the actinides family?

Calculate the mass of 0.750 mol of the following substance. na3po4.