Explanation Given: Cs – 113 or Cs – 125 Fe – 62 or Fe – 70 A stable nuclide has longer half-life. Stability depends upon the N Z (neutron to proton) ratio. For elements with Z = 20, stability value of N Z is 1. For Z = 30, stability value of N Z is 1.13 For Z = 40, stability value of N Z is 1.25 For Z = 50, stability value of N Z is 1.40 For Z = 80, Stability value of N Z is 1.53 a. Cs – 113: Number of protons= 55 Number of neutrons= 113 − 55 = 58 N Z ratio= 58 55 = 1...

Chemistry: Structure and Properties Custom Edition for Rutgers University General Chemistry

15th Edition

ISBN: 9781269935678

Author: Nivaldo J. Tro

Publisher: Pearson Education

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Concept explainers

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.

Question

Chapter 21, Problem 43E

Interpretation Introduction

To determine:

Which nuclide of given pairs has longer half-life.

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Chapter 21, Problem 42E

Chapter 21, Problem 44E

Chapter 21 Solutions

Chemistry: Structure and Properties Custom Edition for Rutgers University General Chemistry

Ch. 21 - Prob. 1SAQ Ch. 21 - Prob. 2SAQ Ch. 21 - Prob. 3SAQ Ch. 21 - Prob. 4SAQ Ch. 21 - Prob. 5SAQ Ch. 21 - Prob. 6SAQ Ch. 21 - Prob. 7SAQ Ch. 21 - Prob. 8SAQ Ch. 21 - Prob. 9SAQ Ch. 21 - Prob. 10SAQ

Ch. 21 - Prob. 1E Ch. 21 - Prob. 2E Ch. 21 - Prob. 3E Ch. 21 - Prob. 4E Ch. 21 - Prob. 5E Ch. 21 - Prob. 6E Ch. 21 - Prob. 7E Ch. 21 - Prob. 8E Ch. 21 - Prob. 9E Ch. 21 - Prob. 10E Ch. 21 - Prob. 11E Ch. 21 - Prob. 12E Ch. 21 - Prob. 13E Ch. 21 - Prob. 14E Ch. 21 - Prob. 15E Ch. 21 - Prob. 16E Ch. 21 - Prob. 17E Ch. 21 - Prob. 18E Ch. 21 - Prob. 19E Ch. 21 - Prob. 20E Ch. 21 - Prob. 21E Ch. 21 - Prob. 22E Ch. 21 - Prob. 23E Ch. 21 - Prob. 24E Ch. 21 - Prob. 25E Ch. 21 - Prob. 26E Ch. 21 - Prob. 27E Ch. 21 - Prob. 28E Ch. 21 - Prob. 29E Ch. 21 - Prob. 30E Ch. 21 - Prob. 31E Ch. 21 - Prob. 32E Ch. 21 - Prob. 33E Ch. 21 - Prob. 34E Ch. 21 - Prob. 35E Ch. 21 - Prob. 36E Ch. 21 - Prob. 37E Ch. 21 - Prob. 38E Ch. 21 - Prob. 39E Ch. 21 - Prob. 40E Ch. 21 - Prob. 41E Ch. 21 - Prob. 42E Ch. 21 - Prob. 43E Ch. 21 - Prob. 44E Ch. 21 - Prob. 45E Ch. 21 - Prob. 46E Ch. 21 - Prob. 47E Ch. 21 - Prob. 48E Ch. 21 - Prob. 49E Ch. 21 - Prob. 50E Ch. 21 - Prob. 51E Ch. 21 - Prob. 52E Ch. 21 - Prob. 53E Ch. 21 - Prob. 54E Ch. 21 - Prob. 55E Ch. 21 - Prob. 56E Ch. 21 - Prob. 57E Ch. 21 - Prob. 58E Ch. 21 - Prob. 59E Ch. 21 - Prob. 60E Ch. 21 - Prob. 61E Ch. 21 - Prob. 62E Ch. 21 - Prob. 63E Ch. 21 - Prob. 64E Ch. 21 - Prob. 65E Ch. 21 - Prob. 66E Ch. 21 - Prob. 67E Ch. 21 - Prob. 68E Ch. 21 - Prob. 69E Ch. 21 - Prob. 70E Ch. 21 - Prob. 71E Ch. 21 - Prob. 72E Ch. 21 - Prob. 73E Ch. 21 - Prob. 74E Ch. 21 - Prob. 75E Ch. 21 - Prob. 76E Ch. 21 - Prob. 77E Ch. 21 - Prob. 78E Ch. 21 - Prob. 79E Ch. 21 - Prob. 80E Ch. 21 - Prob. 81E Ch. 21 - Prob. 82E Ch. 21 - Prob. 83E Ch. 21 - Prob. 84E Ch. 21 - Prob. 85E Ch. 21 - Prob. 86E Ch. 21 - Prob. 87E Ch. 21 - Prob. 88E Ch. 21 - Prob. 89E Ch. 21 - Prob. 90E Ch. 21 - Prob. 91E Ch. 21 - Prob. 92E Ch. 21 - Prob. 93E Ch. 21 - Prob. 94E Ch. 21 - Prob. 95E Ch. 21 - Prob. 96E Ch. 21 - Prob. 97E Ch. 21 - Prob. 98E Ch. 21 - Prob. 99E Ch. 21 - Prob. 100E Ch. 21 - Prob. 101E Ch. 21 - Prob. 102E Ch. 21 - Prob. 103E Ch. 21 - Prob. 104E Ch. 21 - Prob. 105E Ch. 21 - Prob. 106E Ch. 21 - Prob. 107E Ch. 21 - Prob. 108E Ch. 21 - Prob. 109E

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A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.. (a) Calculate the age of the rock if the half-life of the decay of rubidium by emission is 4.71010 y. (b) If some S3887r was initially present in the rock, would the rock be younger, older, or the same age as the age calculated in (a)? Explain your answer.
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