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: Choose the BEST answer to the following. The equation that most underlies energy release in nuclear…

A: The equation in option (a) gives the energy of a photon.

Q: What is alpha decay?

A:

Q: 5. Co-60 has a half life of 5.3 years. If a pellet that has been in storage for 26.5 years contains…

A: When the radioactive atoms get decay they decay at the same rate. The pattern of half-life is the…

Q: Your body contains several radioactive isotopes. Approximately 20% of the radiation dose you receive…

A: Beta-decay is a process that takes place in a radioactive atom. The original nuclide is converted…

Q: A radioactive sample has a mass of 185 grams. How much remains after 2 half lives?

A:

Q: Although coal contains only minute quantities of radioactive materials, there is more radiation…

A: Coal power plants required more prevention of radioactive rays, instead of nuclear power plant. Most…

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

Q: A Geiger counter registers a count rate of 5,600 counts per minute from a sample of a radioisotope.…

A: The count rate is 1400 counts per minute. The initial count rate is 5600 counts per minute.…

Q: what is the difference between radioactivity and decay?

A: The difference between Radioactivity and Decay is as follows -  Radioactivity - Radioactivity means…

Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A:

Q: Technetium-99 is an unstable isotope. Given a half-life of 8.01 hours, what is the activity (in…

A: Determine the decay constant.

Q: sample of radioactive material starts with 0 grams. After 3 half lives have passed, how much…

A: Half-life is the amount of time it takes for one half of a sample of a radioactive isotope to decay.…

Q: If you make an account of 1000 people born in the year 2000 and find that half of them are still…

A: An account of 1000 people are made in 2000 and half of them are still alive in 2060. But this does…

Q: What is a radioactive tracer?

A: Radiactive tracer: The tracer is used to detect the radioactive particle in any kind of mechanism.…

Q: A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.…

A: A Geiger counter registers a count rate of N0 = 8000 per minute. After time t = 10 minutes, the…

Q: How is a strong nuclear force is transmitted between a proton and neutron?

A: Nuclear force: Nuclear force is one of the fundamental interaction. It is the strongest of all.…

Q: A Geiger counter registers a count rate of 4,800 counts per minute from a sample of a radioisotope.…

A: Given data:  Initial count rate (N0) = 4,800 counts per minute Time (t) = 10 minutes Remaining count…

Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

Q: After two half-lives of radioactivity amount of radioactive atoms remaining is none O N/2 N/4 O N/8

A: Given data: Number of half-lives (n) = 2 Required: Remaining amount after 2 half-lives

Q: What happens when an unstable nucleus undergoes radioactive decay?

A: Radioactive elements are elements with unstable nuclei. To become more stable, the nuclei undergo…

Q: How long will it take for an amount of Radon-223 to decay to only 60% of the original amount? The…

A:

Q: A sample of 1000 radioactive atoms has a 10 minute half-life. How old is the sample when 750 atoms…

A:

Q: If a sample of a radioactive isotope has a half-life of 1 year, how much of the original sample will…

A:

Q: Which expression correctly describes the radioactive decay of a substance whose half-life is T?…

A: To choose correct expression that describes the radioactive decay of a  substance whose half life is…

Q: Number of Ra-223 Nuclei 60 50 40 30 20 10 0 0 LO 5 10 15 20 Time/days 25 30 35

A:

Q: Which describes radioactive decay of a substance?

A: Which describes radioactive decay of a substance.

Q: The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in…

A: The formula of the radioactivity is  where, N is the amount left, No is the initial amount, t is…

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: nuclear/ radioactive decay may be best expressed as Group of answer choices N = No e-1/λλt No = N…

A:

Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A:

Q: The half-life of radon-222 is 2.8 days. How many days would it take for the activity due to radon in…

A: Given that:- Half life of radon-222=2.8 days

Q: What are the types of Radioactivity?

A: There are three types of radioactivity and they are: Alpha decay: An alpha particle is a helium…

Q: Only 85% of the initial amount of a certain radioactive material following exponential decay remains…

A:

Q: If a sample of a radioactive isotope has a half-life of 3 years, how much of the original sample…

A: The half-life of the sample = 3 years (a) That means, after every 3year the sample becomes half of…

Q: , how old is a sample if two-thirds of it is now the daughter isotope? What type of decay is…

A: We know , N=N0e-λt Where, N= remaining part of the sample N0=Initial amount of the sample λ=decay…

Q: A certain radioisotope has a half-life of 8.96 days. What percentage of an initial sample of this…

A:

Q: What characteristics of radioactivity show it to be nuclear in origin and not atomic?

A: Radioactivity is a type of process in which there is an emission of the particle from unstable…

Q: r measures 80 counts per minute. After TWO hours have gone by, what counts will the Geiger counter…

A:

Q: 33.)Cobalt-60 is usually used as a radiation source in the practice of medicine. This isotope of…

A: Half life is the time in which the cobalt activity will be reduced to 1/2 of its initial value .

Q: If the half-life of a radioisotope is 2 days, after how many days is the quantity reduced to 12.5%…

A:

Q: If a sample contains 20g of an isotope that has a half life of 1000 years. How much will be left…

A: Given data:  Initial amount of sample (N0) = 20 g Half life (T1/2) = 1000 years Required: Remaining…

Q: What is activity or rate of decay? Give its SI unit.

A: Generally the activity R which is the rate of decay is expressed in decays per unit of time.

Q: The initial activity of a radioactive source is 600 counts per second. After a time T, its activity…

A:

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.