Suppose Radon gas is trapped in a basement after renovations. The half life of radon gas Is 3.8235 days. If the initial Activity was measured to be 75 Bq/m^3, what is the Activity after 14 days?
Q: radioactive
A:
Q: he isotope of Curium 242Cm has
A:
Q: Radon gas has a half-life of 3.83 days. If 2.86 g of radon gas is present at time t = 0, what mass…
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 charred bones of a sloth in a cave in Chile represent the earliest evidence of human presence at…
A: Given, Specific activity of bone (N)=5.22 disintegrations per minute per gram of carbon (d/min.g).…
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: Tritium has a half-life of 12.3 years. Suppose there are initially 1.0 x 1012 tritium atoms. (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: 18F is an unstable isotope of fluorine (Z=9) that decays by beta plus emission (β+ decay) with a…
A: The solution can be given as follows :-
Q: The air in some caves includes a significant amount of radon gas, which can lead to lung cancer if…
A:
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
A: Given, The half-life, t1/2=1.405×1010 year The mass of the thorium, m=230×10-3 g The molecular mass,…
Q: An 10 g sample of a radioactive element takes 5432.6 years to reduce into 1 g. Calculate the…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
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 half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr)…
A: Determine the number of carbon molecules per mole. Determine the initial number of atoms of C-14.
Q: The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy…
A: Solution:-
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: 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: Plutonium has a decay constant of 2.75 x 10-16 s-1. Suppose we had a 1.00 g sample what will be its…
A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…
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: In a piece of rock from the Moon, the Rb content is assayed to be 1.89×1010 atoms per gram of…
A:
Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half- life = 5 730…
A: In this question we have to find the age of the given sample in the nearest year. Please give…
Q: radioactive source of a single nuclide emits 2.4 MeV neutrons at the rate of 2400 neutrons per…
A:
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: Plutonium-239 (atomic number 94) is a by-product of nuclear power plants. It decays via alpha and…
A: A) decay constant = 0.693/half life = 0.693/24100 = 0.0000287 yr-1 = 0.693/(24100*365*86400) = 9.12…
Q: The half life for the radioactive decay of Ce-141 is 32.5 days. If the sample has an activity of 4.0…
A:
Q: A wood artifact discovered in 1990 showed a 14C-activity equivalent to 43% of that found in the…
A: Given : Half life of C-14, t1/2 = 5730 years Let initial count of C-14 be N = 100 The count of C-14…
Q: The number of radioactive atoms in a sample decay as the emission of radiation proceeds and this may…
A: Recall N=N0e-λt Where t1/2=ln2/λ and τ=1/λ
Step by step
Solved in 2 steps with 2 images
- 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 4cmicrociThe half-life of Ra-226 is 1.60 x 10^3 years = 5.05 x 10^10 s Find k What is the activity in curies of a 1.00 g sample? What is the mass in grams of a Ra-226 sample that has an activity of 1.00 x 10^9 atoms/min?Archeologist 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 % 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)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.The body of a stone-age man was found in a glacier in 1997. The body was dated using radiocarbon dating. Recall that t1/2 for 14C is 5840 yrs and R0 = 0.25 Bq for 1 g of 14C in a living organism. Material found within the body had a 14C activity R = 0.133 Bq per gram of carbon. What is the age ( in years) of the body?
- The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours. Calculate the half-life of the nuclide.The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1MeV. What is the power emitted by a sample of 242Cm with a starting number of N0 = 1018 atoms after 80 days?If 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?
- Radon gas has a half-life of 3.83 days. If 2.70 g of radon gas is present at time t = 0, what mass of radon will remain after 2.40 days have passed?Archeologists can determine the age of artifacts made ofwood or bone by measuring the amount of the radioactive iso-tope ¹⁴C present in the object. The amount of isotope decreasesin a first-order process. If 15.5% of the original amount of ¹⁴C is present in a wooden tool at the time of analysis, what is theage of the tool? The half-life of ¹⁴C is 5730 yr.