Calculate the percent abundance of the two isotopes of a fictional element, georgium, if it has an average atomic mass of 291.23 u. Go-290 289.86 u
Go-292 292.07 u
A) Go-290, 38% and Go-292, 62%
B) Go-290, 62% and Go-292, 38%
C) Go-290, 42% and Go-292, 58%
D) Go-290, 58% and Go-292, 42%
E) cannot be determined

Question

Quizplus · Accepted Answer

The average atomic mass is closer to the mass of Go-292, indicating it has a higher abundance. Calculating using the formula: (289.86 * x) + (292.07 * (1-x)) = 291.23, solving gives Go-290 as 38% and Go-292 as 62%.

Calculate the Percent Abundance of the Two Isotopes of a Fictional