A pure carbon archaeological artefact has an age of 20000 years and an activity of 6 counts/min. Find the activity of the artefact at the time it was made. Question 4Select one: a. 1.76 Bq b. 0.76 Bq c. 0.10 Bq d. 1.12 Bq e. 2.32 Bq

Q: A nucleus of radius 3.26 fm contains 10 neutrons. Identify the element by name (not symbol). Use…

A: Given : Radius of nucleus (R) = 3.26 fm No. of neutrons (N) = 10

Q: A man, whose lungs are on average filled with 1 liter of inhaled air, lives in a house with a radon…

A: Given(s): Average inhaled air= 1 lit. Radon gas activity, A=1.0 x10-12 Curie/liter. Require:…

Q: A cobalt-60 source with activity 2.6 *10^-4 Ci is embedded in a tumor that has mass of.0.20kg. The…

A: Since there are multiple sub-parts posted, we will answer the first three sub-parts for you. If you…

Q: Problem A You have a 3 mol pure sample of an unknown material. After 3.7 h, you discover that 20%…

A: We can use the equation for radioactive decay: N(t) = N0 e^(-λt) where,N(t) is the amount of…

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: Mantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made…

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Q: 1. The number of nuclei in a radioactive sample decreases to one fourth (25.0%) of the original…

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Q: Help.answer.explain A nucleus of Th-231 undergoes beta decay. Write the equation that explains this.

A: A nucleus of Th-231 undergoes beta decay. To write the equation of beta decay.

Q: Qc

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Q: Determine the half-life (in s) of a radioactive sample that contains 1.10 x 105 atoms of the…

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

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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: The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy…

A: Let t1/2 denote the half-life of the given isotope of Curium and λ denotes the decay constant of the…

Q: A radioactive isotope with an intensity (activity) of 100 mCi per vial is delivered to a  hospital.…

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Q: Plutonium has a decay constant of 2.75 x 10-16 s-1. Suppose we had a 1.00 g sample what will be its…

A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…

Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…

A: We need to find the age of the alloy based on the given information.

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

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Q: Part A A sample of U (T1 = 1.59 × 10° yr) contains 6.10 x 1018 nuclei. Part B Approximately how many…

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Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 3.30 ✕ 1011 Bq when…

A: Given. N = 1.7*10¹⁵  dN/dt = 3.3*10¹¹ Formula used  N(t) = N⁰*0.5t/T Where  T is half life

Q: What is the activity of a 398.8-g lump of carbon that is 2.79 x 10" years old? Give your answers in…

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Q: Cadmium-107 has a half life of 6.52 hours. If you start off with sample which has an activity of 1.0…

A: The reactivity of the sample after time t is given by:

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: Unit When aboveground nuclear tests were conducted, the explosions shot radioactive dust into the…

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Q: As a staff scientist at a nuclear power plant, it is your job to understand radioactive substances…

A: Here we use law of radioactive decay to find the answer

Q: The radium isotope 226 Ra has a hall-life of 1600 years. A sample begins with 3.50x1010 226 Ra atoms…

A: The half-life of 226Ra is T1/2 = 1600yr and the Initial amount is N0 = 3.50 x 1010

Q: What is the activity of a sample of C that contains 5.3x1020 nuclei? The half-life of C is 5700…

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Q: The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1…

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Q: Select the product nucleus resulting from the alpha particle decay of: 237 Np 93   a. 233 Pa 91…

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Q: Barium-133 is a radioactive element used in certain medical procedures.  A sample of pure Barium133…

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