A radioisotope has a half-life of 5.00 min and an initial decay rate of 6.00 × 10³ Bq. (a) What is the decay constant? (b) What will be the decay rate at the end of (i) 5.00 min, (ii) 10.0 min, (iii) 25.0 min?
Q: A radioactive material produces 3.522E+3 decays per minute at one time, and 5.47 h later produces…
A:
Q: A certain radioactive nuclide decays with a disintegration constant of 0.0256 h1 (a) Calculate the…
A: Given(s): Decay constant, λ=0.0256 h-1 Require: Half-life, t12=? Fraction of sample left after,…
Q: Question 4. A synthetic radioisotope is freshly prepared in a lab that has an ac- ivity of 10.0 mCi.…
A: Given data as per question t = 5.00 h A0 = 10.0mCi
Q: The nuclide 14C contains (a) how many protons and (b) how many neutrons?
A:
Q: c) For a radio-nuclide, a number No of atoms at time t = 0 decays as N(t) = No ext, where \ is the…
A: The objective of the question is to derive the relationship between the half-life and the time…
Q: The activity of a sample of a radioisotope at some time is 10.5 mCi and 0.38 h later it is 7.50 mCi.…
A:
Q: radioactive
A:
Q: (A) The half life of the U-232 is 68.9 years. What is the activity of 1.00 kg of U-232? (B) After…
A: Given Data: Half life = T = 68.9 years = 68.9 years×365 days1 year×24 hrs1 day×60 min1 hr×60 sec1…
Q: Calculate the nuclear binding energy per nucleon, in MeV, for a nucleus containing 135 nucleons, of…
A:
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
Q: f you start at t = 0 a decay rate of r = 10,000 Cs -137 decays per second, how many decays per…
A: The half life of Cs-137 is 30.17 years t1/2 = 30.17 years = 30.17*365*24*60*60t1/2 =
Q: Question 6. At Canadian Light Source, a synthetie radioisotope is freshly prepared. The initial…
A: Given: The initial activity of synthetic radioisotopes is A0 = 10 mCi The activity changes after t =…
Q: The activity of a sample of a radioisotope at some time is 10.5 mCi and 0.46 h later it is 7.00 mCi.…
A: Initial activity of isotope is Ro = 10.5 mCi Activity after some time is R = 7.00 mCi Time elapsed…
Q: U235 has a decay constant of 3.138 × 10-17 s-1. Activity of 1 ug of the sample will be 80.386×10-3…
A: Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at…
Q: 18F is an unstable isotope of fluorine (Z=9) that decays by beta plus emission (β+ decay) with a…
A: solution is given by
Q: A radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…
A:
Q: A tree falls in a forest. How many years must pass before the C activity in 1.00 g of the tree's…
A: mass = 1 g number of atoms = number of moles * avogadro number = (1/14)(6.022 * 1023) = 4.3 * 1022…
Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…
A:
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A: Half life of C-14 T1/2= yearsinitial activity of sample A0= BqActivity of sample At = Bq
Q: 131I is a Beta - emitter used as a tracer for radioimmunoassay in biological systems. (a) Write the…
A:
Q: What is the Decay Rate (k), if the Half Life is 10.5 days?
A:
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: Iodine-125 (¹251) is used to treat, among other things, brain tumors and prostate cancer. It decays…
A:
Q: How many half lives must pass for the mass of a radioactive sample to decrease to 35% of the…
A: Half life of a radioactive sample is the time required for the sample to reduce to half of its…
Q: A radioactive material has a decay constant of λ = 0.0586 yr-1. If it starts out with N0 = 9.03 ×…
A: Given: Decay constant : λ=0.0586 yr-1 N0=9.03×1018 t = 407 years To find N left after given t years.
Q: e half-life of 131I is 8.04 days. (a) Convert the half-life to seconds. s (b) Calculate the decay…
A: "Since you have posted a question with multiple sub-parts, as per strict guidelines to us we will…
Q: How many half-lives must elapse until (a) 77% and (b) 99 % of a radioactive sample of atoms has…
A: Solution in answer, feel free to ask for clarifications if needed.
Step by step
Solved in 2 steps with 2 images
- Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining the fraction of the original 40K remaining in a sample from the ratio of 40K:40Ar. Unusually, potassium-40 decays into both 40Ca (89.1% of the time) and 40Ar (10.9% of the time) with a half-life of 1:248 x 10^9 years.1. What is the calculated age of a sample in which the faction of 40K remaining was found to be 0.0043?2. Is this result physically plausible?U-235 has a decay constant of 3.138 × 10¹7 s¹. Calculate the ratio of U-235 remaining after 500 million years.The activity of C-14 can be used to determine the age of some archaeological discoveries. Suppose a sample of ancient wood which contains C-14 has an activity of 7.50 x 10^-4 Ci. The half life of C-14 is 5730 years. What will be the activity of this sample after 250 years?
- Question 4. A syuthetic radioisotope is freshly prepared in a lab that has an ac- tivity of 10.0 mCi. If the activity of the radioisotope changes to 8.00 mCi, in 5.00 h, (a) What is the decay constant and half-life of the radioisotope in seconds? (b) How many atoms of the radioisotope were contained in the freshly prepared sam- ple? (e) What is the sample's activity in mCi 40.0 h after it is prepared?(a) For the nuclei N and o, determine the difference in binding energy per nucleon (in MeV). (Let the mass of a proton be 14 1.0078 u, the mass of a neutron be 1.0087 u, the mass of N be 14.0031 u, and the mass of O be 14.0086 u.) MeV (b) This difference in binding energy is due to which of the following? 14 Greater proton attraction for the 0 nucleus 14 Greater neutron attraction for the O nucleus 14 Greater electron attraction for the 0 atom Greater proton repulsion for the o nucleus O Greater electron repulsion for the O 14 O atom 14 O Greater neutron repulsion for the o nucleus(a) For the nuclei B and C, determine the difference in binding energy per nucleon (in MeV). (Let the mass of a proton be 1.0078 u, the mass of a neutron be 1.0087 u, the mass of ¹B be 11.0093 u, and the mass of C be 11.0114 u.) Mev (b) This difference in binding energy is due to which of the following? O Greater electron attraction for the ¹C atom O Greater electron repulsion for the C atom Ⓒ Greater neutron attraction for the C nucleus O Greater neutron repulsion for the C nucleus O Greater proton attraction for the C nucleus O Greater proton repulsion for the C nucleus