The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the original radioisotope remains 8 hours after being injected in a patient?

Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…

A: Write the expression of decay rate. N=N0e-tt1/2

Q: Two radioactive sources M and N, have half-lives of 4.0 hours and 6.2 hours, respectively. The…

A:

Q: A drug prepared for a patient is tagged with 4399Tc, which has a half-life of 6.05 h. The dose…

A:

Q: considered to be reduced to a safe level after 10 half-lives have elapsed. (Obviously, the initial…

A: Radioactivity from a particular radioisotope is considered to be reduced to a safe level after 10…

Q: After how many half-lives will (a) 10.0%, (b) 5.00%, and (c) 1.00% of a radioactive sample remain?

A: Formula to calculate the number of half-lives is,

Q: A 73.0 kg person experiences a whole-body exposure to alpha radiation with an energy of 1.50 MeVMeV.…

A:

Q: A Geiger- Mueller counter registers an initial reading of 3200 counts while measuring a radioactive…

A:

Q: How many half-lives would have to elapse for a sample of a radioactive isotope to decrease from an…

A: No = 192 cpmN = 3 cpm

Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…

A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…

Q: Radioactive indium-111 has an effective half-life of 2.5 days.If a dose with an activity of 3.0 mCi…

A:

Q: After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the…

A: (a) Since 1 liter of milk contains 2 g of potassium which 0.0117 % is the isotope 40K in 1 liter of…

Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…

A: The number of half -life passed in a time is,

Q: unknown radioactive element decays into non-radioactive substances. In 480 days the radioactivity of…

A:

Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…

A:

Q: 14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: a general rule, the radioactivity from a particular radioisotope is considered to be reduced to a…

A: Radioactivity from a particular radioisotope is considered to be reduced to a safe level after 10…

Q: You go to the doctor and he gives you 13 milligrams of radioactive dye. After 24 minutes, 7.75…

A: Given, An initial dose of the dye, N0=13mg After 24 minutes 7.75mg of the dye remains.…

Q: Suppose Radon gas is trapped in a basement after renovations. The half life of radon gas Is 3.8235…

A:

Q: A Geiger counter registerss a count rate of 6,800 counts per minute from a sample of a radioisotope.…

A:

Q: An artifact classified as charcoal, found in a site at Epirus, Greece, is found to have a 14C…

A: initial radioactivity(Ro)=0.255 counts per second final radioactivity(R)=4.36 X 10-2 counts per…

Q: If a rock containing U-238 initially reads 41.2 counts per minute on a Geiger counter, what will its…

A: The reading after 6 weeks will be 41.2 counts per minute

Q: A radioactive sample studied in a lab is found to have a half-life of 48 hours. If the initial…

A: Radioactive decay is the process by which an unstable nucleus becomes stable. The half-life for a…

Q: A radioisotope was injected in the human body. The half-life of the radioisotope is T/2 = %3D 6…

A: Given: T1/2=6 hours

Q: To cure thyroid cancer, a child is injected with the radioisotope Iodine-125, which emits x-ray…

A: Given, To cure thyroid cancer, a child is injected with the radioisotope Iodine-125, which emits…

Q: The sample is transported from the excavation site to the laboratory. On arrival to the laboratory,…

A: Radioactive Decay Law The rate of decay of the radioactive nuclei is directly proportional to the…

Q: 131I is a Beta - emitter used as a tracer for radioimmunoassay in biological systems. (a) Write the…

A:

Q: What fraction of radioactive nucleus sample survive after two half-lives?

A: Half-life is the time taken by the radioactive element to become the half of the original amount as…

Q: Monique, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…

A:

Q: A patient is injected 465 MBq of radioactive isotopes with a half life of 110 minutes. How much…

A: Given: Half life, T=110 min=6600 s Radioactive injected in a body, N0=465 MBq Let's find the…

Q: A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same…

A:

Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…

A: Activity N=N0e-λt  10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…

Q: You go to the doctor and he gives you 11.2 milligrams of radioactive dye. After 14.5 minutes, 8.98…

A:

Q: A radioactive sample has a decay constant of 0.219 3/minute. (a) What is its half-life? (b) If at…

A: The relation between the half life and the decay constant is  T = 0.693λ The equation of…

Q: A radioactive sample studied in a lab is found to have a half-life of 25 hours. If the initial…

A: Radioactive decay is the process by which an unstable atomic nucleus spontaneously emits particles…

Q: A wooden object found in an indian burial groud and subjected to radiocarbon dating. The decay rate…

A: Given: The final disintegrations N = 10 disintegrations per minute per gram carbon.

Q: Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same sample…

A: Given:Initial count rate, N0 =6520 count/minFinal count rate, N = 422 count/mintime, t = 10.1 hr

Q: an element with initial mass 1 kg started radioactivity in 2021 , in which year the element will…

A: The mass is proportional to the radiation concentration. Which means that the radiation equation can…

Q: The half life for the decay of carbon-14 is 5.73* 10^3 years. Suppose the activity due to the…

A: The half life for the decay of carbon-14 is 5.73* 10^3 years.  A tiny sample of an artifact made of…

Q: The radionuclide 32P (T1/2 = 14.28 d) is often used as a tracer to follow the course of biochemical…

A:

Q: building has become accidentally contaminated with radioactivity. The longest-lived material in the…

A: Answer is 1685.2 years

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.