Americium-241 (241Am) is a synthetic isotope used in smoke detectors. It undergoes alpha decay to neptunium-237 (237Np) with half life of 432.2 years An absolutely tiny initial mass of 241Am is used in typical smoke detector; 0.30 micrograms (0.00000030g) How many micrograms 241-Am will remain after 70 years? Report your answer to 2 significant figures

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

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Q: The most abundant radon isotope is radon-222, which is an alpha emitter with a half-life of 3.8…

A: Given - Half life of Radon-222 = 3.8 days            Initial level/amount 0f Rdon-222 = 500 Bq m-3…

Q: Neptunium-237 was the first isotope of a transuranium element to be discovered. The decay constant…

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Q: The fraction of a radioactive isotope remaining at time tis  (1/2)t/t1/2, where t1/2is the…

A: Given: a) Fraction of Carbon-14 in a piece of charcoal after 10.0 yr is calculated as shown below,

Q: In addition to C-14, K-40 is often used for archeological dating. K-40 decays to Ar- 40 by positron…

A: The rate of radioactive decay has been proven to be of first order kinetics. Using the understanding…

Q: What was the original mass of a sample if 0.0750 grams remain after 11.47 days?

A: Given, The half life of Rn-222 is 3.823days.   0.0750 grams remain after 11.47 days  The original…

Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  What isotope is produced by the…

A: Nuclear reaction: A nuclear reaction must cause a transformation of at least one nuclide to another.…

Q: Calculate the binding energy (in Joules per nucleon) of 37Cl17 with a nuclear mass of 36.97031 amu.…

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Q: Fluorine-18, which has a physical half-life of 110 min, is used in PET scans. if 1.00g of…

A: The fluorine-18 sample was shipped at 5:00 PM and arrives the laboratory at 9:30 AM in the next…

Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: Given: The beta decay rate is measured at = 690 decays/min. sample from the totem pole contains =…

Q: A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.(a)…

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Q: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

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Q: -33. The number of radioactive nuclides in a sample decays from 1.00 × 1020 to 2.50 × 10º in 10.0…

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Q: 4. The americium isotope Am is unstable and emits a 5.538 MeV alpha particle. The atomic mass of Am…

A: #4: An alpha particle, He24 has 2 protons (Z = 2) and 4 unit mass. Hence when an alpha particle,…

Q: The isotope 83212Bi has a half-life of 1.01 years. What mass (in mg) of a 2.00-mg sample will not…

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Q: 1. What is the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours

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Q: mammoth skeleton has a carbon-14 decay rate of 0.0077 disintegration per second per gram of carbon.…

A: We need to find out how long ago the mammoth lived.  We are given the carbon-14 decay rate i.e.…

Q: Charcoal samples from Stonehenge in England were burned in the presence of oxygen with the resulting…

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Q: 12% of a certain radioisotope decay in 5.2 years, what is the half-life of this isotope?

A: Note : As per our guidelines , we are supposed to answer first question .Please resubmit the other…

Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: Numerous studies in the biochemistry of the study of living pathways are aided by phosphorus-32,…

A: Part a: A beta particle, also called beta ray or beta radiation, is a high-energy, high-speed…

Q: How much time is required in days for a 6.25 mg sample of Cr-51 to decay to 1.75 mg if it has a…

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Q: The half-life of 1311 is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay…

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Q: 8. For the radioactive nuclides in table 7.1, which one has the largest value of the decay constant?…

A: The question it is asked that among the four radioactive atoms which atom have higher value of decay…

Q: Calculate the time required for 23.40 % of a sample of 110X (t1/2 = 15.2 h) to decay. Use the…

A: For first-order kinetics,                                                  ln[A]t[A]o= -kt…

Q: One gram of a sample of Bi decays to 0.25g after 10 days. The half life ofBi in 83 83 days is A 3 B…

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Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: The age of the sample is calculated as: Age=n×t12 where n is the number of half lives and t1/2 is…

Q: Consider the I-131 nucleus that is used to treat thyroid. Mass of I-131 is 130.78302 amu. 1) what is…

A: To answer questions regarding I-131 nucleus.

Q: The Q value for the alpha decay of Tl203 is calculated to be 0.91 MeV from the masses of the initial…

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Q: Carbon-10 is an unstable isotope with an atomic mass of 10.016853 u. It undergoes beta-plus decay…

A: The total binding energy of an atom is the sum of energy that is emitted as the atom is created by…

Q: 225 Ac 9.9 d 221Fr de days 4.8 m h hours meminutes Sseconds ms milliseconds usmicroseconds X1 32 ms…

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Q: The hydride of an unstable nuclide of a Group IIA metal, MH2 , decays by α-emission. A 0.025 mol…

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Q: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: Radium-226 (atomic mass - 226.03), the only naturally occurring isotope of this element, follows the…

A: Since the half-life of the 2nd and 3rd decay are very small in comparison to the 1st one, the 2nd…

Q: Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β– emission with…

A: In general, Number of proton is equal to the number of atomic number.The atomic number of is 44,…

Q: You want to find out how many atoms of the isotope 65Cu are in a small sample of material. You…

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Q: Ruthenium-106 (^ 106 Ru) is used to treat melanoma in the eye. This isotope decays by Beta ^- with a…

A: Ru has an atomic number 44 and has seven stable isotopes.27 radioactive isotopes are present.106Ru…

Q: QB - An alien visited our planet in year 5305 and found that humans have long gone from this planet…

A: Given: Mass of 226Ra = 2.5 g. Mass of 206Pb = 6.8 g. And the half-life of decay = 1640 years.

Q: The half-life of 14C is 5730 years, and the current decay rate in living organisms is 14.3…

A: Given: The activity of sample = 4.75 d.p.m/g C The activity of fresh wood = 14.3 d.p.m/g C And…

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 91.3 g of ²P, how…

A: The answer to the following question is- half life = 14.3 days ,

Q: Phosphorus-32 has a half-life of 14.0 daysdays. Starting with 2.00 gg of 32P32P, how many grams will…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.10 billion years old by…

A: Concept:  Radioactive decay: It is the process by which an unstable atomic nucleus loses energy by…

Q: You take a course in archacology that includes field work. An ancient wooden totem pole is excavated…

A: The above question can be solved using the formula  t1/2 = 0.693/k Where k is the rate constant k=…

Q: Fluorine-18 is a radioactive isotope use in a variety of medical imaging procedures including…

A: Half-life of 18F isotope = 1.83 hours

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.