How many half lives must pass for a substance to lose 87.5% of its original amount? Group of answer choices A: 3.5 B: 2.5 C:4.0 D:3.0 E: 4.5

Q: (b) T¯ +p → K* + µ¯ (a) n¯ → µ¯+Vµ (c) n → p+ e¯ + ve (d) n → n+ + T-

A: Concept: Particle Physics: Here, Reaction is allowed or not allowed depends on the fact that if Any…

Q: 1. If a material has a half-life of 92.5 days, how long will it take for 40% of the material to…

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Q: Iodine-120 has a half life of 1.35 hours. If you start off with a sample which has an activity of…

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Q: The corresponding graph shows a group of points (a, b, c, d), which represent the number of original…

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Q: Example (3) : 0.2 gram of pure potassium 40 ("K) emit about 10 beta rays per second .Estimate its…

A: Mass , m = 0.2 gm  Atomic weight = 40  To find = Half life

Q: ults vary with the amount of the sample. The decay constant represents a percentage of the sample…

A: Decay constant, proportionality between the size of a population of radioactive atoms and the rate…

Q: 1The half-life of Calcium-47 is 3.91 x 105 seconds. A sample contains 4.11 x 1016 nuclei. How much…

A: Question 1) GivenHalf life of calcium, t1/2=3.91×105 sInitial amount of Nuclie, No=4.11×1016…

Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…

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Q: Cobalt-60 and iodine-131 are used in treatments for some types of cancer. Cobalt-60 decays with a…

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Q: There are three naturally occurring stable isotopes of magnesium: 24Mg, 25Mg, and 26Mg, which have…

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

Q: The radionuclide 1311 Has a half-life of 100 hours. The activity of a m = 60mg of 1311 Is about: (N.…

A: Given: half life T1/2= 100 hours= 100*3600= 360000 sec we know that T1/2 = 0.693/λ λ is decay…

Q: A new element, Philosophium, was discovered. It has a decay constant of 2.90 x 10-3 s¹ and is a…

A: The formula for alpha decay is: N(t)=N0e-λt .......................... (1) where N(t) is the amount…

Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…

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Q: A pure sample of 226 Ra contains 2.0 x 10^14 atoms of the isotope. If the half life of. 226 Ra = 1.6…

A: Given that, No. of atoms of a pure sample of 226 Ra is 2.0 x 1014 atoms. The half-life of the sample…

Q: A sample of radioisotope has a decay constant of 9.978x107 s1 and prepared with an initial activity…

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Q: Calculate the radioactivity of 0.5mg of cobalt 56 in units of curie? Its radioactivity is 50 days,…

A: Given data: The sample amount of cobalt is  m=0.5 mg=0.5×10-3 g The atomic mass of cobalt is A= 56 g…

Q: The rubidium isotope 8Rb is a ß emitter with a half life of 4.9 × 1010 y that decays into 87Sr. It…

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Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…

A: The following data are given:

Q: FORMATION OF ELEMENTS: You are going to complete the following nuclear reactions and identify the…

A: We have to complete the nuclear reaction and write its cosmic phase Nuclear reaction Cosmic Phase…

Q: A sample of radioisotope has a decay constant of 9.978×107 s1 and prepared with an initial activity…

A: Given: The decay constant of the radioactive sample is 9.978x10-7 s-1. The initial activity of the…

Q: 4. What is the energy absorbed in this endothermic nuclear reaction 23 Al + n → Mg+H? (The atomic…

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Q: 1. An ancient club is found that contains 120 g of pure carbon and has an activity of 7.5 decays per…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: The Carbon-14 activity of a 0.520 g sample of an ancient Aboriginal boomerang stored at the South…

A: The activity of living red gumwood, α0=0.226 decays/s.gm. The half life of C614, t12 = 5730 years.

Q: How many alpha particles are absorbed by the person (assume that 100 percent of the alpha particles…

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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: The following items detail a decay chain from radioactive Uranium-235 to stable Lead-207. What is…

A: The chain of Uranium-235 is called the  "actinium series".  This decay series contains the following…

Q: The nucleus O has a half-life of 122.2 s; 0 has a half-life of 26.9 s. Assume, that at some time a…

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Q: Iodine-120 has a half life of 1.35 hours. If you start off with a sample which has an activity of…

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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: How many kilograms of water are needed to obtain the198.8 mol of deuterium, assuming that deuterium…

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Q: A patient with thyroid cancer is given a sample of lodine-131 which has a half-life of 8 days. If…

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Q: A sealed box was found and contained an alloy composed of equal parts by same weight of two metals A…

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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: Corals take up certain elements from seawater, including uranium but not thorium. After the corals…

A: The activity of any element is given by R=0.693Nt12

Q: If the half-life of actinium-227 is 21.8 years, approximately how much time will be required to…

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Q: Element X has a half-life of 6 hours. How much of X remains from a 64 kg sample after one day?…

A: Given data The half-life of element X is given as t1/2 = 6 hrs. The original sample of element X is…

Q: The half-life of 231Pa is 3.25 × 104 years. How much of an initial 10.41 µg sample remains after…

A: Given that half life of 231Pa is 3.25* 10^4 year and initial amount of sample is 10.41microgram.…

Q: RADIOACTIVITY. LAW OF RADIOACTIVE DECAY Activity units: 1 Ci = 3.7 × 1010 Bq 1. Nuclear decay law: N…

A: Given: Iodine-120 , I-120 has half life, T1/2 = 1.35 hours. = 4860 s Initial activity , A0 = 1 Ci

Q: A drug tagged with Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of…

A: GivenHalf life (T1/2)=6.05 hActivity of sample (A0)=1.5×104   Bq

Nuclear interactions

In nature, there are certain rules and standards for an interaction. These interactions are universally accepted. There are four types of interactions: