A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number N of radioactive atoms of the isotope is given by: N=Noe-λt (i.) Sketch a graph of this equation and show on the graph the time equal to the half-life of the sample, T1/2. (ii.) Explain what is meant by disintegration rate of a sample and represent this on the graph at zero time and at time, T1/2. State the ratio of these two disintegration rates. (iii.) Explain the physical significance of the constant λ in the equation above

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: A half life is defined as the amount of time taken for the number of radioactive nuclei present in a…

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Q: The decay behavior of a radioactive substance obeys first order kinetics: ln(N/No) = –kt, where N is…

A: first order kinetics,lnNN0=-ktwhere N is amount of radioactive nucle at timehalf life=20 min=1200…

Q: 1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms…

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Q: The half-life of radium-226 is 1600 years. Suppose we have a 55 mg sample. Find a function that…

A: Write the expression for the radioactive decay model for the function that models the mass m(t)…

Q: The radioactive element 2,6°Co has a half life of years. If you had a sample of 17 g, about how long…

A: Concept: Here, in this Question we will use the Formula for Half Life that is, dNdt=-λNOn…

Q: An unknown radioactive element decays into non-radioactive substances. In 360 days the radioactivity…

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Q: A sample contains 1,174 present one year earliera Give your answer to 3 sig

A: Given data, A = 1174. A0=?. Half life T12=33 days. Time t = 365 days.

Q: What fraction of a radioactive sample is left after exactly 6 half lives? Give your answer to 3…

A: Number of half life (n) = 6

Q: The graph above represents the nuclear decay of a radioactive element, measured using a…

A: Graph is given as,

Q: Consider an initial amount of 708g of radioactive material with half-life h=3.2hdays. Use a…

A: Write the expression of radioactive degradation. N=N0e-t/t1/2

Q: Using a nuclidic chart, write the symbols for (a) all stable isotopes with Z =60, (b) all…

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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: Q10: Using a nuclear counter the count rate of emitted particles from a radioactive source is…

A: Given value--- at t = 0 , count rate = 1600 count/s. after 6 second , count rate = 100 count/s. We…

Q: A sample from human remains found near Stonehenge in England shows that 71.2% of the carbon-14 still…

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Q: lease answer the following question(s): 1. The decay of radioactive substance is given by -t rch…

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Q: What is the half-life in days of a radioactive sample with 4.9x10¹5 atoms and an activity of 6.5×108…

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

A: Half life of the carbon-14 Activity of the fresh wood Activity of the decayed wood

Q: The decay rate of a radioactive source decreases by 28% in 80 h. Determine the half-life, decay…

A: The decay rate for a radioactive material follows the following decay equation A=Aoe-λtA is the…

Q: a) The activity of a radioactive source is given by dN AN dt where N is the number of nuclei present…

A: A) The activity of a radioactive source is given by : -dNdt = λN initial number of nuclei = No at t…

Q: A radioactive material is disintegrating in such a way that after 24 seconds, there is only 20.5% of…

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Q: If 16 g of radon with a half-life of 4 days is present in a balloon at t = 0, what is the mass of…

A: Most of the nuclei present are unstable in nature. They try to gain stability by disintegrating…

Q: The decay of radioactive substance is given by N = Noe (1), where N is the number of atoms present…

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Q: A particular smoke detector contains 1.05 μCi of  241Am241Am, with a half-life of 458 years.  The…

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Q: What is the Decay Rate (k), if the Half Life is 10.5 days?

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Q: d) Below is a decay curve for iodine-131. This is used in the treatment of thyroid cancer.…

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Q: NUCLEAR CHEMISTRY: Consider the nuclei Sn with an atomic number of 50 and mass number is 117.…

A: Calculate the number of neutrons in Sn nucleus. N=A-Z=117-50=67 Here,  The number of neutrons is N.…

Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…

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Q: Supposed that a radioactive substance has decayed until only of 1/8 of it remains. How many…

A: let initial number of Nucleons= N0 remaining number of Nucleons= N =N08

Q: How many half-lives must elapse until (a) 77% and (b) 99 % of a radioactive sample of atoms has…

A: Solution in answer, feel free to ask for clarifications if needed.

Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…

A:

Q: Strontium-90 is a radioactive material that decays according to the function A(t) = An e -0.0244t…

A: Given that---- initial amount of material A0 = 500 g.  Radioactive material decay function-----…

Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…

A: Concept: The time required for a quantity to reduce to half of its initial value is known as…

Q: One method for determining the age of ancient objects is by radiocarbon dating. Natural processes…

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Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…

A: Given that, Half life of the isotope, T = 140 days  We know that,  The half life is the time in…

Q: A pure sample of a newty discovered radioactive isetope is discovered. I has a halt-ife of 59 min.…

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Q: The amount of radioactive material present at time t is given by A =?0? ?? where ?0 is the initial…

A: Amount of radioactive substance at time t is, A=Aoekt.............1 where Ao is the initial amount,…

Q: There was a sample of 500 milligrams of a radioactive substance to start a study. Since then, the…

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.