What is the decay probability per second per nucleus of a substance with a half-life of 5.0 hours?
Q: Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from…
A:
Q: The mass of carbon in an animal bone fragment found in an archeological site is 200 g. If the bone…
A: Mass of carbon m=200 g. We know that 12 g of Carbon has 6.022*1023 Nuclei so 200 g of carbon would…
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: Calculate the binding energy (in MeV) per nucleon for an α-particle (4He nucleus), given that the…
A: Since you have asked multiple questions we will solve first question for you.please post remaining…
Q: An 1 g sample of a radioactive element takes 83.92 million years to reduce into 1 µg. Calculate the…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
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: 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: Technetium-99 is an unstable isotope. Given a half-life of 8.01 hours, what is the activity (in…
A: Determine the decay constant.
Q: A 85 kg patient swallows a 31 μCi beta emitter with a half-life of 5.0 days, and the radioactive…
A: Given data: The mass of the patient is m=85 kg. The radiation is R=31 μCi. The half-life is…
Q: Mantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made…
A:
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: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
A:
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: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…
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: 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: 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. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…
A:
Q: Marie and Pierre Curie managed to extract 1 mg of radium from ten tonnes of uranium ore in 1898. The…
A: The decay constant for radium-226 can be calculated using the following formula: λ = ln(2)/ t½ Where…
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: Radioactive element AA can decay to either element BB or element CC.The decay depends on chance, but…
A:
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) What is the decay constant of fluorine-17 if its half-life is known to be 66.0 s? = b) How long…
A: Given value--- Half life time of F-17 (t 1/2) = 66 sec. We have to find--- What is the decay…
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…
- Radioactive decay is the process by which an unstable nucleus becomes a stable one by emitting energy in the form of radiation or particle. The rate of decay in a sample is called its activity.
- The decay probability or decay constant is the number of decay per nucleus per second. It is given by,
Here t1/2 is the amount of time it takes for the activity of a radioactive sample to reach half of its original value.
Step by step
Solved in 3 steps
- A building has become accidentally contaminated with radioactivity. The longest-lived material in the building is strontium-90. (The atomic mass of 90/38 Sr is 89.9077 u.) If the building initially contained 8.6 kg of this substance and the safe level is less than 10.4 counts/min, how long will the building be unsafe? Provide answer in number of years.the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the decay rate is 500 counts/min. what is the half-life?What is the decay probability per second per nucleus of a substance with a half-life of 22.5 hours?
- A 75 kg patient swallows a 33 μCi beta emitter whose half-life is 5.0 days and whose RBE is 1.6. The beta particles are emitted with an average energy of 0.35 MeV, 90% of which is absorbed by the body. You are a health care worker needing to find the patient's dose equivalent after one week. These series of steps will help you find that dose equivalent. In all questions, assume the radioactive nuclei are distributed throughout the patient's body and are not being excreted. Part A How many radioactive nuclei did the patient swallow? Express your answer using three significant figures. ▸ View Available Hint(s) No= ΜΕ ΑΣΦ Submit ?iodine 131 has a half life of 8.04 days if you start with a radioactivr I 131 sample having an activity equal to 40 microci after how long is the activity going to be 4cmicrociArcheologist extracted 179 gm of carbon from an animal bone from an archeological site. The carbon shows an activity of 15 decays/s. (Half-life of 146C = 5730 years, 1 year = 3.156 x 107 seconds, Avogadro's number = 6.02 x 1023 atoms/mol) (A) Total number of atoms in this carbon sample = . (B) Decay constant of 146C, λ = . (C) Number of 146C atoms in this sample = . (D) Activity of 146C at time (t = 0) = . (E) Age of the animal =
- Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% 232Th, with a half-life of 1.405 x 10¹0 y. If an average lantern mantle contains 270 mg of thorium, what is its activity (in Bq)? XBq tIf the activity of a sample of radioactive material is initially 10 Ci and the half-life of the material is 1.2 hour. What is the activity after 4.2 hours?