Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Chapter 12, Problem 1RAT
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How is it possible for an element to decay “forward in the periodic table”—that is, to decay to an element of higher atomic number?
Atom A has a larger atomic mass than atom B. Does this mean that atom A also has a larger atomic number? Explain.
Part 1: Carbon dating
An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 387 g (HINT: Assume all the carbon is 12C
and determine the number of atoms, 12C has a molar mass of 12 g/mol) and careful measurements show that the remaining 14C has a
current decay rate of 20 decays/s. Determine the age of the bone (and presumably the jewelry). The ratio of 14C to 12C when the animal died
was 1.25x10-12 & the half-life of 14C is 5730 y. Additionally, 1 mol = 6.022×1023 particles, 1 y = 365.25 days, & 1 day = 24 h.
age of bone =
Part 2: Rubidium-Strontium dating
A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This is possible because 87Rb, which has a
half-life of 4.75×1010 y, undergoes - decay and becomes 87Sr. The geologist determines that the ratio of 87 Sr to 87Rb is 0.033. Assuming
there was no 87Sr in the rock when it was formed, determine the age of the rock.
age of rock =
Chapter 12 Solutions
Conceptual Physical Science (6th Edition)
Ch. 12 - Prob. 1RCQCh. 12 - Prob. 2RCQCh. 12 - Prob. 3RCQCh. 12 - Prob. 4RCQCh. 12 - Prob. 5RCQCh. 12 - Prob. 6RCQCh. 12 - Prob. 7RCQCh. 12 - Prob. 8RCQCh. 12 - Prob. 9RCQCh. 12 - Prob. 10RCQ
Ch. 12 - Prob. 11RCQCh. 12 - Prob. 12RCQCh. 12 - If a baseball were the size of Earth, about how...Ch. 12 - Prob. 14RCQCh. 12 - Prob. 15RCQCh. 12 - Prob. 16RCQCh. 12 - Prob. 17RCQCh. 12 - Prob. 18RCQCh. 12 - Prob. 19RCQCh. 12 - Prob. 20RCQCh. 12 - Prob. 21RCQCh. 12 - Prob. 22RCQCh. 12 - Prob. 23RCQCh. 12 - Prob. 24RCQCh. 12 - Prob. 25RCQCh. 12 - Prob. 26RCQCh. 12 - Prob. 27RCQCh. 12 - Prob. 31TASCh. 12 - Prob. 32TASCh. 12 - Prob. 33TASCh. 12 - Rank the following three subatomic particles in...Ch. 12 - Prob. 35TARCh. 12 - Consider three 1-gram samples of matter: A,...Ch. 12 - Prob. 37TARCh. 12 - Prob. 38TARCh. 12 - Prob. 39ECh. 12 - If all the molecules of a body remained part of...Ch. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - Prob. 43ECh. 12 - In what sense can you truthfully say that you are...Ch. 12 - Prob. 45ECh. 12 - Prob. 46ECh. 12 - Prob. 47ECh. 12 - Prob. 48ECh. 12 - Prob. 49ECh. 12 - Prob. 50ECh. 12 - The nucleus of an electrically neutral iron atom...Ch. 12 - Prob. 52ECh. 12 - Prob. 53ECh. 12 - Prob. 54ECh. 12 - Prob. 55ECh. 12 - Prob. 56ECh. 12 - Prob. 57ECh. 12 - Which is heavier: a water molecule, H2O, or a...Ch. 12 - When we breathe we inhale oxygen, O2, and exhale...Ch. 12 - Prob. 60ECh. 12 - Prob. 61ECh. 12 - Prob. 62ECh. 12 - Prob. 63ECh. 12 - Prob. 64ECh. 12 - Prob. 65ECh. 12 - Prob. 66ECh. 12 - Prob. 74ECh. 12 - Prob. 75ECh. 12 - Prob. 76ECh. 12 - Prob. 77ECh. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - Prob. 80ECh. 12 - Prob. 81ECh. 12 - Prob. 82ECh. 12 - Prob. 83ECh. 12 - Prob. 84ECh. 12 - Prob. 85ECh. 12 - Prob. 86ECh. 12 - Prob. 87DQCh. 12 - Prob. 88DQCh. 12 - In 2011, China was the leading producer of...Ch. 12 - Prob. 90DQCh. 12 - Prob. 1RATCh. 12 - Prob. 2RATCh. 12 - Prob. 3RATCh. 12 - Prob. 4RATCh. 12 - Prob. 5RATCh. 12 - Prob. 6RATCh. 12 - Prob. 7RATCh. 12 - Prob. 8RATCh. 12 - Prob. 9RATCh. 12 - Prob. 10RAT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms present at time t, No is the initial number of atoms and T is the exponential decay constant, which is related to the decay rate of the element. The N 1 half-life thalf is the time required for the number to atoms to decay by half ( = No 2 Solve for thalf starting from equation (1) in terms of T. Note: Use MathType to enter in T. Do not use the letter "T" from the keyboard. Don't forget the multiplication sign between variables. Use the asterisk symbol (*) for multiplication or the multiplication symbol in the math editor (orange box). thalf = 0.693 X√ S No, that's not the correct answer.arrow_forwardStrontium - 90 has a half-life of 25 years.How long will it take 10 grams of Strontium – 90 to decay to 3 grams? Round your answer to the nearest hundredth. time A = A.•() half-life final amount initial amount This is the split factor. After a half-life, one pound becomes pound. Your answer: O not enough information is given O 0.03 years O 43.42 yearsarrow_forwardWhen a nucleus decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?arrow_forward
- 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?arrow_forwardPart 1: Carbon dating An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 127 g (HINT: Assume all the carbon is 12C and determine the number of atoms, 12C has a molar mass of 12 g/mol) and careful measurements show that the remaining 14C has a current decay rate of 16 decays/s. Determine the age of the bone (and presumably the jewelry). The ratio of 14C to 12C when the animal died was 1.25x10-12 & the half-life of 14C is 5730 y. Additionally, 1 mol = 6.022x1023 particles, 1 y = 365.25 days, & 1 day = 24 h. age of bone =arrow_forwardTwo protons in an atomic nucleus repel each other, but they are also attracted to each other. Explain.arrow_forward
- How much energy is required to remove a proton from 157? ? (Units: MeV) The following table may be helpful (download it for easier use).arrow_forwardElements above uranium in the periodic table do not exist in any appreciable amounts in nature because they have short half-lives. Yet there are several elements below uranium in atomic number with equally short half-lives that do exist in appreciable amounts in nature. How can you account for this?arrow_forwardA nuclear isotope has a mean lifetime of 76.7 s. What is the half life of this isotope? Number If initially 1.2 mols of the isotope are present how many atoms will remain after 80 seconds Numberarrow_forward
- NUCLEAR CHEMISTRY: Consider the nuclei Sn with an atomic number of 50 and mass number is 117 . Determine its mass defect in kilograms if its atomic mass is 116.956 amu. The mass of a proton and neutron are 1.0073 and 1.0087 amu, respectively. Express your answers in three decimal places in scientific notation, i.e., 6.022e23 to represent 6.022x 105arrow_forwardA rock contains the radioactive isotope ? − 40 that decays with a half-life of 1.3 ??????? ????? and the radioactive isotope ?? − 87 that decays with a half-life of 48.6 ??????? ?????. The rock is 100 ??????? ????? old. The rock currently has 1000 times as many ?? − 87 atoms as there are ? − 40 atoms. (That is, ??? = 1000 × ??.) When the rock first formed it had ? times as many ?? − 87 atoms as ? − 40 atoms. (That is, ???,0 = ? × ??,0.) What is the value of ??arrow_forwardWhich choice below is best for the mass of 4-He? [helium with a mass number of 4] (2) Element (4) Mass Number, (5) Atomic (6) % Abundance (or Radioactive (7) Half-life (if radioactive) Atomic Symbol Number Mass Decay Mode) 0. (Neutron) 1.008665 10.4 min 1 Hydrogen Deuterium 99.985% 0.015% H. 1 1.007825 2.014102 Tritium T 3.016049 12.33 yr Helium 0.000137% 99.999863% Не 3.016029 4.002602 4. 3 Lithium 7.5% 92.5% Li 6.015121 7.016003 EC, 7 100% 4 Beryllium Be 7.016928 53.29 days 9.012182 3.016029 3.016049 4.002602 6.015121 4719arrow_forward
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