A newly discovered element consists of only two naturally occurring isotopes. Isotope A has an atomic weight of 204.5 amu and has an abundance of 75.00% while the other isotope, isotope B, has an atomic weight of 220.8 amu. What should the atomic weight of the new element be listed as on the Periodic Table?

Chemistry for Engineering Students
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Author:Lawrence S. Brown, Tom Holme
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Chapter2: Atoms And Molecules
Section: Chapter Questions
Problem 2.74PAE: 2.74 The accompanying table provides the identity of the two naturally occurring isotopes for four...
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A newly discovered element consists of only two naturally occurring isotopes. Isotope A has an atomic weight of 204.5 amu and has an abundance of 75.00% while the other isotope, isotope B, has an atomic weight of 220.8 amu.

What should the atomic weight of the new element be listed as on the Periodic Table? 

Expert Solution
Step 1

Given : There are two naturally occurring isotopes of an element.

Atomic mass of isotope A = 204.5 amu.

Atomic mass of isotope B = 220.8 amu.

And abundance of isotope A = 75.00 %

 

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