Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.  How many grams will be left after 360 days?

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: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

A: Given: Mo=200 gM=23.0 gt=1 year = 365 days

Q: What is alpha decay?

A:

Q: What is special about neutrons that allows them to cause nuclear fission?

A: The neutrons which cause nuclear fission must be having slow speed. The slow neutrons are those…

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: Suppose the decay constant of radioactive substance A is twice the decay constant of radioactive…

A: Given: Decay constant of A = 2× decay constant of B Half-life of B = 3 h.

Q: One hundred kilograms of a certain radioactive substance decay to 40 kg after 10 years. How much…

A: Given data The initial mass of the radioactive substance is: Xo = 100 kg The mass of the radioactive…

Q: A radioactive material requires short time to decay completely naturally.Is it true or false?

A: The phenomenon of continuous emission of radiation like alpha, beta, gamma, X-rays, etc. from a…

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: what is the difference between radioactivity and decay?

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

Q: What is the daughter nucleus (nuclide) produced when 217At undergoes alpha decay?

A:

Q: A radioactive sample has a mass of 999 grams. How much remains after 2 half-lives?

A: If the amount of a radioactive sample is N0 initially, then after 1st half live of the sample, it…

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: Calculate the mass of a sample of (initially pure) 40K that has an initial decay rate of 1.70 * 105…

A: The initial decay rate,

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: What is a radioactive tracer?

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

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: Which radioactive isotopes are produced when Uranium 238 decays?

A: When uranium 238 decays, it decay by emitting alpha particle.

Q: The radioactive isotope (183-Ta) has a half life of 5.11 days. A sample containing the isotope as an…

A: Given data: Half-life t12=5.11 days Initial activity R0=4.5×108Bq

Q: The activity of a radioactive sample decreases exponentially as the time goes on.

A: Radioactivity of a sample is given as, Where A0 is the initial activity, lambda is the half life…

Q: How is radioactive emission different from radioactivity and radioactive decay?

A: Radiation is a broad term that encompasses all types of energy output and transmission, including…

Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…

A: we have to find half life of the sample, in the given question.

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: Suppose you have a 1 g sample of 226Ra, half-life 1600 years. How long will it be until only 0.1 g…

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: 18. 2. The half-life of a radioactive sample is 30 minutes. If the sample originally contains 4x10°…

A: The half-life of a radioactive isotope is the amount of time it takes for one-half of the…

Q: After three half lives have gone by, what fraction of a sample of a radioactive isotope remains?

A: A half-life is a time period during which nuclei of radio-active sample becomes half of its initial…

Q: A sample of radioisotope has a decay constant of 9.976✕10-7 s-1 and prepared with an initial…

A: Given data: The decay constant of a sample of a radioisotope is, The initial activity of a sample…

Q: Which describes radioactive decay of a substance?

A: Which describes radioactive decay of a substance.

Q: In a sample of radioactive material, what percentage of the initial number of active nuclei will…

A: Concept and Formula -                               let, initial no of active nuclei = N0…

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: The half life of a radioactive nucleus is 50 days. The time interval (t, – t) between the time t;…

A:

Q: If 10% of a radioactive material decays in 5 days, then the amount of the original material left…

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: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly…

A:

Q: The half life of radium is 1.62x10^3years. What fraction of radium would remain after 1.0x10^3years?…

A:

Q: which radioactive decay mode does no result in a different nuclide?

A: Majorly there are 3 types of nuclear decays: Alpha decay: In this decay an alpha particle which has…

Q: The half-life of a radionuclide is 26.4 years. The time required for a 48.0 gram sample of this…

A: Write the given values of the problem- Half life of a radio nuclide=26.4 years Mass of given…

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.