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What is the percent natural abundance of isotopes?

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 23Q Chapter 4

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 23Q

Problem 23Q

What is the percent natural abundance of isotopes?

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Solution 23Q

  • The relative abundance of an isotope in nature compared to other isotopes of the same element is relatively constant.  The chart of the Nuclides presents the relative abundance of the naturally occurring isotopes of an element in units of atom percent.  
  • Atom percent is the percentage of the atoms of an element that are of a particular isotope.   Atom percent is abbreviated as a/o.For example, if a cup of water contains 8.23 x 10   atoms of oxygen, and the isotopic abundance of oxygen-18 is 0.20%, then there are 1.65 x 10 atoms of oxygen-18 in the cu. .
  • The atomic weight for an element is defined as the average atomic weight of the isotopes of theelement.  The atomic weight for an element can be calculated by summing the products of the isotopic abundance of the isotope with the atomic mass of the isotope.

Example:calculate the atomic weight for the element lithium.  Lithium-6 has     an atom percent abundance of 7.5% and an atomic mass of 6.015122 amu.  Lithium-7 has an atomic abundance of 92.5% and an atomic mass of 7.016003 amu.Solution:The other common measurement of isotopic abundance is weight percent (w/o).  Weight percent is the percent weight of an element that is a particular isotope.  For example, if a sample of material contained 100 kg of uranium that was 28 w/o uranium-235, than 28 kg of uranium-235 was present in the sample

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Chapter 4, Problem 23Q is Solved
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Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. This full solution covers the following key subjects: abundance, Isotopes, natural. This expansive textbook survival guide covers 19 chapters, and 2046 solutions. Since the solution to 23Q from 4 chapter was answered, more than 352 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. The full step-by-step solution to problem: 23Q from chapter: 4 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. The answer to “What is the percent natural abundance of isotopes?” is broken down into a number of easy to follow steps, and 8 words.

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What is the percent natural abundance of isotopes?