Concept explainers
Interpretation:
The
Concept introduction:
The isotope contains the different numbers of neutron and same number of protons. So, the atomic mass of the isotope is different. The calculation of the atomic mass of elements is termed as the average atomic mass.
Answer to Problem 129A
The average atomic mass of zirconium is
Explanation of Solution
The given table is:
The Relative abundance of zirconium isotopes | ||
Element | Mass (amu) | Abundance (%) |
Zirconium-90 | ||
Zirconium-91 | ||
Zirconium-92 | ||
Zirconium-94 | ||
Zirconium-96 |
The main important value is the mass of isotope and their abundance, for the elemental average atomic mass.
Where m = mass of each isotope and the abundance value is given in percentage form so fraction value is used for the calculation.
Take the weighted average.
Atomic mass of Zr
The value of average atomic mass of zirconium is equal to
The isotope atomic mass and their abundance from the given table helped forthe calculation of average atomic mass of the zirconium.
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Glencoe Chemistry: Matter and Change, Student Edition
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