Question

3. Calculate the atomic mass of each of the following elements using your method from above. You must show your work for each calculation below the table. Test your answer using Nature's mix of isotopes and the periodic table. Isotope 1 Isotope 2 Isotope 3 Check answer with sim Element Mass (amu) Sage Mass (amu) Sage Mass (amu) %age Calculated average atomic mass (amu) Yes No Hydrogen

A. 1.007
B. 99.98
C. 2.01410
D. 0.011​

Answer 1

To calculate the average atomic mass of an element with three naturally occurring isotopes, you multiply the percent abundance of each isotope by its mass and sum the results.

Step-by-step explanation:

The average atomic mass of an element is calculated as the weighted average of the masses of the naturally occurring isotopes. To calculate the average atomic mass, you multiply the percent abundance of each isotope by its mass and sum the results. For example, if an element has three naturally occurring isotopes with different abundances (%1, %2, %3) and masses (mass₁, mass₂, mass₃), the average atomic mass can be calculated as follows:

Average Atomic Mass = (%1 x mass₁) + (%2 x mass₂) + (%3 x mass₃)

Using this formula, you can calculate the average atomic mass of the given element by substituting the given percent abundances and masses into the equation and solving.