Question

Determine mass contribution for the following isotopes of the same element.

At the end, tell me the atomic mass of the element using the mass contributions.

Do not forget your units or the question will be marked incorrect.

Isotope 2 amu: 186.956

percent abundance: 62.6%

Atomic Mass of the element ?​

Answer 1

Answer: Not possible to find average amu with only the information provided.

Step-by-step explanation:

Is there more information about the other isotopes? I don't see how one could calculate an overall atomic mass with only one isotope is known. An isotope of 186.956 with abundance of 62.6% isn't enough information. We're not told anything about the other isotopes: are they larger, smaller, and at what percentage. If one has an amu of 204.956 at 37.4%, the overall atomic mass would be quite different than if it had an atomic mass of 182.956 at 37.4%. More infornmation is required.