Iodine 125 emits gamma rays when it decays to Tellerium 125 and has a half life of 60 days. It a 0.0020g pelet of iodine 125 is implanted iinto a prostate gland, how much iodine 125 remains there after one year?

The half-life of Carbon14 is 5730years. The carbon 14 activity of the living thing material is approximately 920 decays/hr per gram of carbon. A fragment of wool fabric from an archaeological site has an activity of 680decays/hr per gram of carbon. What is the approximate date of the sample?

If an ancient piece of wood is found to have one-sixteenth the original amount of carbon-14 in it, then how old is it if the half-life of this isotope in 5,730 years?

If a 40.00 mg of I-131 decays 20.00 mg in 10 days and in another it would decay to 10.0O0 mg, what is the half- life of iodine? * 8 days 4 days 10 days O 16 days

A theoretical isotope known as Du-30 has a half life of 6 months. The amount decreased from 1.50M to 0.12M. Determine the time it took for the isotope to decay.

32 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 91.3 g of ºP, how much "P was present 9.00 days ago? g

A wooden artifact from an ancient tomb contains 30 percent of the carbon -14 that is present in living trees. How long ago, to the nearest year, was the artifact made?( The half-life of carbon-14 is 5730)

The cesium-137 has a half life of 30 years after 90 years about 10g.remains. the original mass of cesium -137 is how much?

A decay series starts with the synthetic isotope 23992U. Thefirst four steps are emissions of a β- particle, another β- , an α particle, and another α . Write a balanced nuclear equation foreach step. Which natural series could start by this sequence?