Half - Life Practice %3D 2. If you have 100 grams of a radioactive isotope with a half-life of 10 years a. How much of the isotope will you have left after 10 years? b. How much of the isotope will you have left after 20 years?

Half - Life Practice %3D 2. If you have 100 grams of a radioactive isotope with a half-life of 10 years a. How much of the isotope will you have left after 10 years? b. How much of the isotope will you have left after 20 years?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter31: Radioactivity And Nuclear Physics

Section: Chapter Questions

Problem 5CQ: What is the source of the energy emitted in radioactive decay? Identify an earlier conservation law,...

See similar textbooks

Similar questions

A group of scientists use carbon dating to date a piece of wood to be 3 billion years old. Why doesn’t this make sense?
What is critical temperature Tc? Do all materials have a critical temperature? Explain why or why not.
What is the source of the energy emitted in radioactive decay? Identify an earlier conservation law, and describe how it was modi?ed to take such processes into account.
Does loud irradiation leave the food radioactive? To what extent is the food altered chemically for low and high doses in food irradiation?
2) Uranium-238 undergoes alpha decay. Into what element does Uranium 238 transmute? What is the atomic number of the new element? 4) Technetium-99 m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally 100mg , how much would remain after 24 hours? 5) How long would it take a 1-kg radioactive substance with a half-life of 100 years to decay into1 2.5 g?
1. A radioactive substance with an initial mass of 250 mg has a half-life of 1 year. a) Write an equation to relate the mass of radioactive material remaining to time b) What mass will remain after 10 years? c) How long will it take the initial sample to decay to 20% of its initial mass? (Please show how you arrived at your answer by showing all of your calculations.)
If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is the half-life of the isotope? Hint: First, determine how many times the sample has lost half of its mass, which tells you how many half-life cycles have occurred.
5.Atree falls in a forest. How many years must pass before the carbon-14 mass in the tree’s carbon drops to 3.125% of its value in living tree? The half-life of carbon-14 is T= 5570 years.
(1). Define/describe the following terms and give examples, where applicable:1. Cosmic Rays-2. Nuclide- 3. Nucleon-4. Alpha Rays-5. Beta Rays-6. Gamma Rays-
High energy cosmic rays from space hit the nitrogen in the atmosphereand convert it from nitrogen (N14) into carbon (C14). This produces a steadyconcentration of C14 in the atmosphere once the decay rate of the C14 back intoN14 matches the conversion rate from the cosmic ray flux (which is assumedto be constant for reasons you can ask me about if you want).a) What kind of radiation (what kind of particle) does the C14 emit when it decays? Tellme how you know?b) The concentration of C14 in plants (and animals) comes into equilibrium with the atmosphere because living things use the ambient carbon to make their cellular structures.However, once a plant dies, it no longer consumes C14. The C14 starts to decay away—allowing us to calculate when the plant died because the C14/C12 ratio doesn’t match theatmosphere. If the half life of C14 is 5000 years, what is the age of a piece of charcoal froma site from the Clovis peoples of North America if the concentration of C14 is 15% of…
234 Pa → 4 He + ______ 91 2 When balancing the nuclear reaction, explain the following: How does the Law of Conservation of Matter dictate what the daughter nuclide is? How do we calculate the atomic mass and atomic number for the daughter nuclide? Where do we look up what the new daughter nuclide element is?
What is the binding energy per nucleon for the following isotopes? Suppose that mn = 1.008665 u, m1H =1.007825 u, 1u= 931.494 MeV/c2. 1) What is the binding energy per nucleon for 2H? Be sure to look up the atomic mass of Hydrogen -2 for use in your calculations. (Express your answer to six significant figures.) 2) What is the binding energy per nucleon for 4He? (Express your answer to six significant figures.) 3) What is the binding energy per nucleon for 12C? (Express your answer to six significant figures.) 4) What is the binding energy per nucleon for 56Fe? (Express your answer to six significant figures.)