Which radioactive sample would contain the greatest

Co is the only one I know from memory for I worked with it many years ago. It is 5. First Name. Your Response. Which of the following statements about radioactive dating is true? Radioactive decay is the rate at which new atoms form. During radioactive decay, atoms break down, releasing particles or energy. The rate of decay of a. Complete the table for the radioactive isotope.

Round your answer to two decimal places. What is the nuclear symbol for the radioactive isotope of copper with a mass number of 60? An unknown radioactive element decays into non-radioactive substances.

In days the radioactivity of a sample decreases by 39 percent. A radioactive isotope has a half-life of 10 years. What fraction of the original mass will remain unchanged after 50 years.

If there were 10 grams of a radioactive isotope, how much of the sample would be left after 1 half-life? How much after 2 half-lives?

A radioactive sample contains 1. The half-life of a radioactive isotope is What is the total amount of a 1.

An isotope of a radioactive element has half-life equal to 9 thousand years. Imagine a sample that is so old that most of its radioactive atoms have decayed, leaving just 10 percent of the initial quantity of the isotope remaining. How old is the sample? Give your answer correct to at least one decimal place. A sample contains 24 g of a radioactive isotope. How much radioactive isotope remains in the sample after 2 half-lives? Ask on App Ask on Whatsapp.

Question :. This browser does not support the video element. The half-life of a radioactive isotope is 2. The mass of it that remains undecayed after 10 hour is If the initial mass of the isotope was 16g. A sample contains 10 mg of radioactive material of half life days. The mass of remaining radioactive material after days will be. The half-life of a radioactive isotope is 10 years, after 20 years what percentage of its original volume will remain?

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were g, the undecayed remaining mass after 18 hours would be. If the initial mass of the isotope were g, the mass of it remaining undecayed after 18 hours would be. The half life of a radioactive isotope is 4 hours. If the initial mass of the isotope were 25 g, the mass of it remaining undecayed after 12 hours would be:.

Half life of a radioactive sample is 2x years. Volcanic ash Samples collected from strata in Olduvai Gorge, East Africa, which sandwich the fossil remains of Zinjanthropus and Homo habilis -- possible precursors of modern man. Monzonite Samples of copper-bearing rock from vast open-pit mine at Bingham Canyon.

Rhyolite Samples collected from Mount Rogers, the highest point in Virginia. Gneiss Samples from outcrops in the Karelian area of eastern Finland are believed to represent the oldest rocks in the Baltic region. These rocks intrude even older rocks that have not been dated. Morton Gneiss [see Editor's Note ] Samples from outcrops in southwestern Minnesota are believed to represent some of the oldest rocks in North America.