Question

A fictitious element X is composed of 78.0% of the isotope X-50, 15.0% of the isotope X-51 , and 7.0% of the isotope X-52. Estimate the atomic mass of element X. Show your work.

Answer 1

(0.78*50) + (0.15*51) + (0.07*52) = ?

Answer 2

x-51=7.65
x-52=3.64
x-50=39
7.65+3.64+39=50.29

Answer 3

My answer is the weighted atomic mass of element X = 0.1*55 + 0.2*56 + 0.7*57 = 56.6 g/mol. hope this help you all *v*