Question

Use the information and table to answer the following question.

What is the average atomic mass of element X?

Answer 1

To calculate the average atomic mass/relative atomic mass, we take the sum of (mass x percent abundance) of the isotopes and divide that by 100 (if that makes sense).

-> Relative atomic mass =
`(27.98 x 92.2 + 28.98 x 4.67 + 29.97 x 3.10)/(100) = 28.07999...`

So, we round it to 28.08