Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% 232Th , with a half-life of 1.405 × 1010 y. Randomized Variablesm = 270 mg If an average lantern mantle contains 270 mg of thorium, what is its activity in Bq?

Q: sample 3.00 hours before the injection (at 7:00 am) with an activity of 3.53 μCi at the preparation…

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Q: A pure carbon archaeological artefact has an age of 20000 years and an activity of 6 counts/min.…

A: The objective of the question is to find the activity of a pure carbon archaeological artefact at…

Q: You are an archaeologist, and send some leather clothing found at a burial site to be radiocarbon…

A: The general formula for the activity as a function of time t is given by, Here, A, Ao, λ and t…

Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…

A: Number of Thorium nuclei in 390mg of thorium is N  = 60.2*1023/mol/232g/mol *(390*10-3g)     =…

Q: Consider the nuclei Sn with an atomic number of 50 and mass number is 118 . Determine its mass…

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Q: The charred bones of a sloth in a cave in Chile represent the earliest evidence of human presence at…

A: Given, Specific activity of bone (N)=5.22 disintegrations per minute per gram of carbon (d/min.g).…

Q: If the Q-value of beta minus decay is 2.820 MeV, what is the approximate average beta energy? A.…

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

Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…

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Q: (Hand by written ans.)Mantles for gas lanterns contain thorium, because it forms an oxide that can…

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Q: The air in some caves includes a significant amount of radon gas, which can lead to lung cancer if…

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Q: a sample with a half-life of 19 days has an initial activity of 7.0 x 10^5 counts/s. what isits…

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Q: Suppose the activity due to the radioactive decay of the carbon-14in a tiny sample of an artifact…

A: The activity of fresh wood sample is The activity of old wood sample is The half life of carbon 14…

Q: A sample of 134La(T/2 = 6.5 min) has an activity of 4 curies. What was its activity one hour ago?

A: Final Activity A = 4 curies Half life T1/2 = 6.5 min  time t = 1 hour = 60 min

Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…

A: Dear student Activity is defined as rate of radioactive decay of nuclei. It is denoted by  R = ¥ N…

Q: A 70kg person experiences a whole body exposure to alpha radiation, RBE=15 with energy 4. 77MeV. A…

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Q: A sample of material contains 2.00 x 1015 atoms. The sample initially consists entirely of a…

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Q: A certain amount of a sample of 96X has an activity of 0.1084 μCi. In 24.2 days, the activity of the…

A: Given, A certain amount of a sample of 96X has an activity of 0.1084 μCi. In 24.2 days, the activity…

Q: A 70-kg person experiences a whole-body exposure to alpha radiation (RBE=15) with energy 4.77 MeV. A…

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

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Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half- life = 5 730…

A: In this question we have to find out the age of the samole in the nearest year with the help of the…

Q: A radoiactive sample has a decay constant of 0.2193/minute. a. What is it's half life? b. If at the…

A: Given, Decay constant, λ = 0.2193/minuteNumber of nuclei, No = 3.2×1015 We know that,λ =…

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: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half- life = 5 730…

A: Given: Half life time,t12=5730yr=5730×3.1536×107sMass of archeological sample of…

Q: Two radioactive waste products from nuclear reactors are strontium Sr (712= 29.1yr) and cesium Cs…

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Q: Consider the 1² N nucleus. Find approximate values for its (a) radius, (b) volume, and (c) density.…

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Q: Use the worked example above to help you solve this problem. The half-life of the radioactive…

A: Given data:T1/2=1.6×103 yrN0=3.41×1016 nucleiFirstly, converting half life into…

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

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Q: Q41. A radioactive source has a half-life of 20 days. Calculate the activity of the source after 70…

A: Radioactive elements emit radiation of different types. With time the amount of the radioactive…

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

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Q: A scientist is studying a 2.234 g sample of thorium-229 (t1/2 = 7340 yrs) in a laboratory.    (a)…

A: The mass of the thorium is 2.234 g.The half-life time of the thorium is 7340 years.

Q: An ancient artifact is found to contain 240 g of carbon and has an activity of 479 decays/min. ▬…

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Q: 74 74 33As disintegrates to 32Ge in 68% of the cases, and to 34Se otherwise. T₁ for the 2 parent…

A: Radioactive decay: The spontaneous process in which the unstable radioactive nuclei disintegrate…

Q: The half-life of 60?? is 5.27 years. The activity of a 60?? is 3.50 × 109 Bq. What is the mass of…

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Q: The half-life of 43100Tc, a ß- emitter, is 15.8 s. a). How many atoms of 43100Tc are present in a…

A: Half life of decay = 15.8 Activity of sample = 0.2×10-6 = 3.7×1010 ×0.2×10-6 = 7400Bq

Q: gram of caesuim (55 Cs) decays by B-emission with a half life of 30 years. (a) Name the resulting…

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Q: The decay rate dt for N number of radioactive nuclei is dN dt - AN What is meant by higher decay…

A: The formula of the radio activity is  where, N is the number of atoms present and is the decay…

Q: Answer the following questions about the radiochemistry involved in PET scans. All answers are…

A: To explain the correct answer is given below.

Q: A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten days…

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Q: A. A cobalt-60 source with activity 2.60×10-4 Ci is embedded in a tumor that has mas 0.20 kg. The…

A: Given : Activity (A) = 2.60 × 10-4 Ci  Mass (m) = 0.20 kg Energy (Eγ) = 1.25 MeV = 1.25 × 1.6 ×…

Q: A drug containing 9943Tc with an activity of 2.00 μCi is to be injected into a patient at 11:00 am.…

A: Given, At 11:00am, activity of  is, A = 2μCi But initially, at 7:00am, activity of is, Ao = 3.16μCi…

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.