ong periods of time. Natural thorium is almost 100 % 232^Th, with half life of 1.405*10^10y. If an average lateen mantle contains 350mg of thorium what is its activity (in Bq)
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: radioactive
A:
Q: A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This…
A: The age of the rock is 1.36 x 10¹⁰ years
Q: If there are 20 mmol of the radioactive isotope 3H (half-life 12 years) at t = 0, how much 3H remain…
A: Initial concentration of radioactive element is Half-life time is Find:(a) Concentration of at…
Q: (a) Write the equation for the decay of 232 Th by a single alpha particle. (b) Determine the energy…
A: To find : equation of decay energy released in this decay percentage of thorium nuclei left…
Q: If the age of Earth is 4.6 billion years, what should be the ratio of 206P6/238U in a…
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: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…
A: Let original number of atoms = NoLet the number of atoms present after time "t" = N
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
Q: Mantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made…
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: the sample must be due to radioactive decay. With all of this in mind, if we find that a rock…
A: This problem can be solved using radioactive decay concept.
Q: If the unit for atomic mass were defined so that the mass of 1H were exactly 1.000 000 u, what would…
A:
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: 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 radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…
A:
Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…
A: Given data: Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…
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: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
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: 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: Cadmium-107 has a half life of 6.52 hours. If you start off with sample which has an activity of 1.0…
A: The reactivity of the sample after time t is given by:
Q: An ancient artifact is found to contain 240 g of carbon and has an activity of 479 decays/min. ▬…
A:
Q: A particular rock is thought to be 234 million years old. If it contains 4.84 mg of 238U, how much…
A: Given : t = 234 million years = 234 × 106 years m = 4.84 mg t1/2 = 4.47 × 109 y
Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…
A: Radioactivity
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 % 232^Th, with half life of 1.405*10^10y. If an average lateen mantle contains 350mg of thorium what is its activity (in Bq)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg sample of carbon from the wood has an activity of 2340 decays per minute. Find the age of the charcoal. Living mate- rial has an activity of 15 decays/minute per gram of carbon present and the half-life of 14C is 5730 y. Answer in units of y. I got 7300.99 but that wasn’t right Can you please help!Plutonium-239 (atomic number 94) is a by-product of nuclear power plants. It decays via alpha and gamma decay. The half-life for the decay is 24100 years. What is the decay constant for Pu-239 expressed in inverse years and inverse seconds? If the sample of Pu-is measured to have an activity of 150 decays per second today, how many years would it take for the sample to reduce to an activity of 5 decays per second? How many Pu-239 nuclei are in the sample measured today?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?
- The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 1.0*10^ 3Bq. The activity in a similar-sized sample of fresh wood is measured to be 6.9*10^3 Bq. Calculate the age of the artifact. Round your answer to 2 significant digits.A piece of charcoal (totally carbon) from an ancient campsite has a mass of 262 grams. It is measured to have an activity of 29 Bq from 14C decay. Use this information to determine the age of the campfire. Your answer is required to be in years. Information: 14C half-life is 5730 years. 1 gram of living carbon has 6.52x1010 atoms of 14Ciodine 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 4cmicroci
- 3. (a) Calculate the decay constant for cobalt-60 (T1/2 = 5.26 Years) in units of week-¹ (b) Calculate the activity of a 5000-Ci cobalt-60 source after 10 years.An unknown element X has the following isotopes: ⁶⁴X (49.00% abundant), ⁶⁶X (28.00% abundant), ⁶⁸X (23.00% abundant). What is the average atomic mass in amu of X?Modern household smoke detectors contain a tiny speck of the element Americium (Am, atomic number 95, atomic mass 241), which has a half-life of 432 years and an activity of (roughly) of 37,000 decays per second. a) What is the approximate mass of this speck? (Hint: the atomic mass of this isotope is approximately 241.06 u). b) This isotope is an alpha emitter. Is its radiation likely to be a hazard to the household members while the smoke detector is on the ceiling? Explain.
- Carbon-14, with a half-life of 5730 years, has a decay constant of λ = 1.21 × 10-4 yr-1. A piece of wood from an archaeological site is found to have 1.9 % of its original carbon-14. How many years old (t) is the piece of wood? Express your answer in scientific notation. Example: 1.23e4.a radioactive material has a half-life of eigth days. how long will take for the material to be reduce on one-sixteeth (1/16) of its original mass? a radioactive sample has a decay constant of 0.219/minute. what is its half-liofe?, if at the start of an exeperiement, there are 3.2x10 nuclei, how much wilkl remain after 1 hour?Use the fact that there are 3.13x107 s/year. (a) The half-life of the radioactive nucleus 22688Ra is 1.58x103 years. What is the decay constant (in s-1) of 22688Ra? (b) If a sample of 22688Ra nuclei has a decay rate of 3.9x105 decays /s at t = 0, then what is the decay rate after the sample is 4740 years old?