an-element-has-two-isotopes-with-masses-of-10-amu-and-11-amu-and-percent-abundan

Question

An element has two isotopes with masses of 10 AMU and 11 AMU, and percent abundances of 20% and 80%, respectively. What is the atomic mass of the element?

Accepted Answer

10.8 AMU

Answer

10.5 AMU

Answer

10.2 AMU

Answer

11.0 AMU