Acertain radioactive element has a half-life of one hour. if you start with 20.0 grams of the element at noon, how much of the radioactive element will be left at 3 p. m.?
a. 10.0 grams b. 5.0 grams c. 2.5 grams d. 1.25 grams

This is what i found on google “when one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and atp is converted to adenosine diphosphate (adp). likewise, energy is also released when a phosphate is removed from adp to form adenosine monophosphate (amp).” i hope this you .