Explanation Explanation The decay constant is given to be 1.0 × 10 − 3 h − 1 . Half life of a nuclide is calculated by the formula, t 1 / 2 = 0.693 λ Where t 1 / 2 is the half life of nuclide. λ is the decay constant

2nd Edition

ISBN: 9781305079243

Author: Steven S. Zumdahl, Susan A. Zumdahl

Publisher: Cengage Learning

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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 18, Problem 25E

Interpretation Introduction

Interpretation: Rate constant for a certain radioactive nuclide is given. Half life of this nuclide is to be calculated.

Concept introduction: Decay constant is the quantity that expresses the rate of decrease of number of atoms of a radioactive element per second. Half life of radioactive sample is defined as the time required for the number of nuclides to reach half of the original value.

To determine: The half life of the given nuclide

Expert Solution & Answer

Chapter 18 Solutions

Chemistry: An Atoms First Approach

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239Pu is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of the 239Pu present today will be present in 1000 y?
The isotope 208Tl undergoes decay with a half-life of 3.1 min.. (a) What isotope is produced by the decay?. (b) How long will it take for 99.0% of a sample of pure 208Tl to decay?. (c) What percentage of a sample of pure 208Tl remains un-decayed after 1.0 h?

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