List the steps in the process of calculating average atomic mass given data about the isotopes of an element

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sjosie348 sjosie348

12-10-2017
Chemistry

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List the steps in the process of calculating average atomic mass given data about the isotopes of an element

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Lukaryse Lukaryse · Answer 1 · 2017-10-12T03:27:17+02:00

1) Find out the relative abundance of each isotope. ex. Carbon 13 has around 0.01% while Carbon-12 has around 99.98%
2) Multiply each isotope by its abundance. Ex: 13(0.01) and 12(99.98)
3) add the abundances Ex. 13(0.01) + 12(99.98) = (should be around 12.01, but i just plugged in random percentages. I hope you get the point)

Tip: In a mass pectrometry graph, if it asks you for an average atomic mass of an element, 90% of the time it's going to be in the periodic table, as the mass of the element in the period table IS the average atomic mass.