Tc-MAA has a physical half-life of 6 hours and a biological half-life of 2 hours. What is its effective half-life?
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A: Let the half life time of the sample is denoted by th. The formula for the disintegration constant…
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A: half life of Ni -63 t/2 = 92 years LET x half life passed (N0 /2)X =( N0 / 128 ) = (N0 /2)7 X = 7…
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
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Q: The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730…
A: The formula of the radioactivity is given below where, T is the half life, t is the time, Ro is the…
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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: A certain isotope has a half-life of 9.82 h. What is its decay constant in s-1?
A: Given, The half-life of an isotope, t12 = 9.82 hr
Q: Radon-222 has a half-life of 3.8 days. What mass of radon-222 would have a decay rate of 2220 Bq?…
A: We use the formula of rate of decay to get the required values.
Q: 3065Zn decays via ββ+ and EC (electron capture). Estimate the half-life of the fully ionized Zinc…
A: Zn-65 disintegrates by an electron capture to the 115keV excited level and by electron capture and…
Q: A typical person of mass 65 kg contains 0.35% potassium, by weight. Of the potassium, 0.012% is 40K,…
A: Given: The mass of person is m=65 kg. The half life of nucleus is t1/2=1.28×109 y. The activity due…
Q: 14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure…
A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…
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Q: 4) Based on your estimate of the half-life of BCTCesium, suppose a BCT student is cleaning up a lab…
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Q: A radioactive substance is found to register 5000 counts per second on a Geiger counter.…
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Q: On your birthday, you measure the activity of a sample of 210Bi, which has a half-life of 5.01 days.…
A: Given Half life (T1/2)=5.01 days Initial activity (Ao)=1.000 μCi
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: Calculate the half-life of Th-232 which has a decay constant of 49.15×10-¹2 s²¹.
A: The rate at which unstable radioactive nuclei decay in a sample of material is called the activity…
Q: The half-life of a radiotracer is 3 hr. (i) Determine the decay constant of the radiotracer, (ii)…
A: Given, half life of radio tracker is, t12= 3hr i) So decay constant is, λ = ln2t12=ln23hr=0.23 hr-1…
Q: Radioactive 214^83 Bi has a half-life of 19.9 min if the activity of the radionuclide 1.2 hours…
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Q: Radioactive substances follow a specific law of decay. Namely, if you have a sample of some…
A: The given problem is based on radioactive decay and half life. The given equation is 128
Q: A radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…
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Q: A certain isotope has a half-life of 9.06 h. What is its decay constant in s-1?
A: Given: The half life time is 9.06 h.
Q: A radioactive substance decays from 60mg to 12.6mg in 20 years according to the exponential decay…
A: Given value--- decays from 60mg to 12.6mg in 20 years . We have to find--- a) find the b -value…
Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: P239u is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of P239u present…
A: The formula for remaining nuclei in terms of half life N=N012tt1/2
Q: A purified sample of Mo-99 contains 370 million Bq. a. What mass does this represent if the…
A: It's a moderate-level question of radioactivity. It's a little bit confusing because 1st question…
Q: The counting rate from a radioactive source is 4000 counts per second at time t=0. After 10 seconds,…
A: We know that activity is N=N0e-λt and T1/2=ln2λ=0.693λ Using the above formula the problem can be…
Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…
A: The radioactive dating of rocks formed from cooled lava is determined by using parallel decay of…
Q: Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm.…
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Q: What is the mass of 25.0 mCi of technetium-99m (Tc99m)Tc99m , which has a half-life of 6.00 h?
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Q: A living specimen in equilibrium with the atmosphere contains one atom of ¹4℃ (half-life = 5 730 yr)…
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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
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