4) During World War II, tritium (*H) was a component of fluorescent watch dials and hands. Assume you have such a watch that was made in January 1944. If 17% or more of the original tritium was needed to read the dial in dark places, until what year could you read the time at night? (For ³H, t/2 = 12.3 yr.) %3D

4) During World War II, tritium (*H) was a component of fluorescent watch dials and hands. Assume you have such a watch that was made in January 1944. If 17% or more of the original tritium was needed to read the dial in dark places, until what year could you read the time at night? (For ³H, t/2 = 12.3 yr.) %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

125^Ba decays by neutron emission write the following to the numerical value A) the chemical symbol of the element produced is b) the number of protons for this product c) the number of neutrons for this product
Sketch a diagram indicating the s-process path from 102Ru to 109Ag. Specify the type ofeach process (i.e. neutron capture, electron capture, beta decays) in the path.
1. (a) The amount of U-238 in a sample decays exponetially. Every 2 billion years, 27% of the sample remains. If U(t) is the percentage of the sample remaining after t billion years, find a formula for U(t)? (If you are unable to do part (a), you may use the function U(t) =80e-/3 for the remaining parts). (b) Find the relative growth rate r, the constant growth factor b, and continuous growth rate k. (c) way to do this problem very easily.) Find the percentage change of U(t) between on the interval (3000, 3001). (Hint: there is a
How is the uranium to lead ratio in a rock used to estimate its age? How does this dating technique provide an estimate for Earth’s age? How old is Earth according to this dating method?<
Which of the following statements is true when a radioactive element undergoes beta decay? The mass number of the new element is decreased by 4, and the atomic number is decreased by 2. The mass number of the new element stays the same, and the atomic number is decreased by 1. The mass number of the new element stays the same, and the atomic number is increased by 1. O The mass number of the new element stays the same, and the atomic number also stays the same.
State the properties of beta partide.Phosphorus 3215P is beta radioactive with a half-life of 1.50 x 107s. 3.8g of 3215P is injected into a plant to serve as a tracer Calculate the initial activity of the tracer.
An 85 kg radiation worker accidently ingest 1.0 mg of Po211. Calculate Number of Po211 atoms ingested.
40K (t1/2 = 1.3 × 109yr) and 14C (t1/2 = 5.7 × 103 yr) are two radioactive isotopes found in measurable quantities in your body. Suppose you have 1 mole of each. Which is more radioactive—that is, which has a greater activity?
What is the daughter nucleus (nuclide) Produce when 211^Pb Undergoes beta decay by emitting an electron
Strontium-90 is one of the most hazardous products of atomic weapons testing because of its long half-life (t1/2 = 28.1 years) and its tendency to accumulate in bone.(a) Write nuclear equations for the decay of 90Sr via the successive emission of two electrons (beta particles).(b) The atomic mass of 90Sr is 89.9073 u and that of 90Zr is 89.9043 u. Calculate the energy released per 90Sr atom, in MeV, in decaying to 90Zr.(c) What will be the initial activity of 1.00 g of 90Sr released into the environment, in disintegrations per second?(d) What activity will the material from part (c) show after 100 years?
Why is uranium-235 an ideal isotope to use for nuclear technology compared to something like carbon-12.
The carbon isotope 11 6C undergoes b+ (positron) decay. The atomic mass of 11 6C is 11.011433 u. (a) How many protons and how many neutrons are in the daughter nucleus produced by this decay? (b) How much energy, in MeV, is released in the decay of one 11 6C nucleus?