Chemistry Isotopes Solution: An element has four naturally occurring isotopes w...

Solution: An element has four naturally occurring isotopes with the masses and natural abundances given here.IsotopeMass (amu)Abundance (%)1135.907140.19002137.905990.25003139.9054388.434141.9092411.13Find the atomic mass of the element.

Problem

An element has four naturally occurring isotopes with the masses and natural abundances given here.


IsotopeMass (amu)Abundance (%)
1135.907140.1900
2137.905990.2500
3139.9054388.43
4141.9092411.13


Find the atomic mass of the element.


Solution

  • Atomic mass of an element can be calculated as summation of the mass of each isotope multiplied by their fractional abundance (%/100):

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