Question

I have to show my work after I find the atomic weight of each element please help !!

Answer 1

Explanation:

For all of the questions, do the following calculation

$\frac{isotope \: \times abundance}{100} + \frac{isotope \: \times abundance}{100} ...$

As an example, I'll do question 1

$\frac{204 \times 1.480}{100} + \frac{206 \times 23.6}{100} + \frac{207 \times 22.6}{100} + \frac{208 \times 52.3}{100} = 207.20$