4. How are isotopes of the same element alike? How are they different? 5. Natural lithium comes in only two isotopes of Li-6 (7.42%) and Li-7 (92.58%). Determine the average atomic mass for lithium. 6. The composition of ordinary neon is: neon-20, 90.92 %; neon-21, 0.26 %; neon-22, 8.82 %. Calculate the average atomic mass of neon. Iron has four isotones: Fe-54 (5.82%): Fe-56 (91,66%): Fe-57 (2.19%) and Fe-58 (0.33%).

4. How are isotopes of the same element alike? How are they different? 5. Natural lithium comes in only two isotopes of Li-6 (7.42%) and Li-7 (92.58%). Determine the average atomic mass for lithium. 6. The composition of ordinary neon is: neon-20, 90.92 %; neon-21, 0.26 %; neon-22, 8.82 %. Calculate the average atomic mass of neon. Iron has four isotones: Fe-54 (5.82%): Fe-56 (91,66%): Fe-57 (2.19%) and Fe-58 (0.33%).

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter5: Stoichiometry

Section: Chapter Questions

Problem 37E: An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass...

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An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.Y766 u. Calculate the average atomic mass, and identify the element.
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