What is the decay probability per second per nucleus of a substance with a half-life of 22.5 hours?
Q: Atts, you have a pure sample of an unknown substance. At t= 293 s, 36.8% of the substance remains.…
A: Radioactive substance remaining at t=293s, N=36.8100×N0=0.368N0
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: How many half-lives would have to elapse for a sample of a radioactive isotope to decrease from an…
A: No = 192 cpmN = 3 cpm
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: 1mg of (210) po decays to have a half-life of 138.3 days for a period of one year. What is the…
A: Given Initial amount, M=1mg=10-3g Half-life, T1/2=138.3 days=1.2×107s Time period, t=1 yr= 3.15×107s…
Q: If a radioactive substance has an initial activity of 0.67 Ci and a half-life of 3.0 days, what is…
A:
Q: A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage…
A: The objective of the question is to find out the fraction of the dosage of Iodine-131 that will…
Q: a sample with a half-life of 19 days has an initial activity of 7.0 x 10^5 counts/s. what isits…
A:
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 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: 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: Samarium-153, a radioactive isotope with a half-life of approximately 48 hours, is used to treat…
A: Given, Half life, T1/2=48hours=2 days
Q: For a fission reaction, 1.92 x 1016 J of energy is released. What is the mass defect in kg?
A:
Q: What is the binding energy per nucleon of 24 Pb? Give your answer in MeV
A: Mass defect of Pb is
Q: A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß- activity of 4.4 X 107 Bq. How many grams of…
A: When the number of protons and neutrons inside a nucleus is not balanced some nuclei will become…
Q: 40.12 A sample of material contains 2.00 x 1015 atoms. The sample initially consists entirely of a…
A: Let N denote the number of atoms of the radioactive substance A. Let t1/2 denote the half-life time…
Q: A drug tagged with Tc (half-life= 6.05 h) is prepared for a patient. If the original activity of the…
A: Given:-Original activity (Ao)=1.1*104 Bq.Time (t) = 1.8 hoursHalf life = 6.05 hFind Activity…
Q: There is more than one isotope of natural uranium. If a researcher isolates 1.00 mg of the…
A: mass = 1 mg = 0.001 g Activity = 80Bqhalf life ??
Q: As a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope…
A:
Q: 7 3Li is 7.016004 u, the atomic mass of 4 2He is 4.002603 u, the atomic mass of a neutron is…
A: Given: Atomic mass of 73Li=7.016004 u atomic mass of 42He=4.002603 u atomic mass of neutron…
Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…
A:
Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…
A: half life of A = 12 years half life of B = 18 years mass of A = 0.53 kg mass of B = 2.20 kg A =…
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
A: Hlf-life time of radioactive element is Mass of element is Note:Molar mass of is Avogadro's number…
Q: The half-life of iodine-131 is 8 days. How long does it take for the initial activity of 4500 kBq /…
A: half life of iodine 131 = 8 days Initial activity (Ao) = 4500 kBqm3Final activity (A) = 65 kBqm3
Q: A sample of carbon of mass 6.74 g taken from an animal jawbone has an activity of 4.00 decays/min.…
A: Given that the 6.74 g of carbon taken from the jawbone. The no. of moles in 6.74 g of carbon be…
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: Iodine-131 is a beta-emitter, which decay by the first-order rate law with a half-life of 8.0 days.…
A: Let t1/2 denote the half-life of the Iodine-131. It is given as 8 days. The decay constant λ can be…
Q: A small region of a cancer patient’s brain is exposed for 24.0 min to 475 Bq of radioactivity from…
A: Given: To find the dose in rads with the given values as,
Q: The radioactive cobalt isotope, 60Co, has an half-life of 63 months and undergoes decay. The molar…
A: Radioactivity is a process in which unstable heavy nuclei convert into more stable lighter nuclei…
Q: A nuclei has a half-life of 2.80 days. If 122 mCi were prepared but had a delay of 8.0 days. How…
A:
Q: Strontium-90 from the testing of nuclear bombs can still be found in the atmosphere. Each decay of…
A: The amount of nuclei initially absorbed is
Q: A living specimen in equilibrium with the atmosphere contains one atom of ¹4℃ (half-life = 5 730 yr)…
A:
Q: an element with initial mass 1 kg started radioactivity in 2021 , in which year the element will…
A: The mass is proportional to the radiation concentration. Which means that the radiation equation can…
Q: The half-life of 27Mg is 9.50 min. initially there were 3.70× 1012 27Mg nuclei present. How many…
A: Given: The half-life of 27Mg t1/2 = 9.50 min At t=0, the number of nuclei of 27Mg, N0 = 3.70× 1012…
Q: A building has become accidentally contaminated with radioactivity. The longest-lived material in…
A:
Q: a) What is the decay constant of fluorine-17 if its half-life is known to be 66.0 s? λ = b) How…
A: Given value--- Half life time of F -17 (t 1/2) = 66 sec. We have to find--- What is the decay…
Q: The reaction shown below has a Q value of 13.574 MeV. H+ N - C+ He Determine the atomic mass (in u)…
A: The Q value of the given nuclear reaction is given by, Q=sum of mass of reactants -sum of mass of…
Q: building has become accidentally contaminated with radioactivity. The longest-lived material in the…
A: Answer is 1685.2 years
Q: the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the decay…
A: Given:- the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the…
Q: In many cases, prostate cancer is treated by implanting 60 to 100 small seeds of radioactive…
A: Given data: The half-life of palladium is t1/2=17 days. The mass contained by the grain is m=0.27…
Q: You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the…
A: A living matter has 1.3×10-10 % of C-14, and the half-life of C-14 is 5730 years. Thus, determine…
Q: A 75 kg patient swallows a 33 μCi beta emitter whose half-life is 5.0 days and whose RBE is 1.6. The…
A: To find out how many radioactive nuclei the patient swallowed, we can use the concept of radioactive…
Q: iodine 131 has a half life of 8.04 days if you start with a radioactivr I 131 sample having an…
A: Half life of I-131 isotope = 8.04 days Initial activity (Ao) = 40 micro Ci Final activity (A) = 4…
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