# Problem: I think I discovered element 120, which would be the last element in the 2A column. It consists of two isotopes. The abundance of the first isotope is 68.00% and its atomic mass is 294.6 u. The abundance of the second isotope is _________ (you can figure this out since there are only two isotopes) and its atomic mass is 297.8 u. What is the average atomic mass of the element? a. 296.2 u b. 295.0 u c. 296.8 u d. 295.6 u e. 297.4 u

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I think I discovered element 120, which would be the last element in the 2A column. It consists of two isotopes. The abundance of the first isotope is 68.00% and its atomic mass is 294.6 u. The abundance of the second isotope is _________ (you can figure this out since there are only two isotopes) and its atomic mass is 297.8 u. What is the average atomic mass of the element?

a. 296.2 u

b. 295.0 u

c. 296.8 u

d. 295.6 u

e. 297.4 u

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Atomic Mass concept. You can view video lessons to learn Atomic Mass. Or if you need more Atomic Mass practice, you can also practice Atomic Mass practice problems.

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Based on our data, we think this problem is relevant for Professor Hamlet's class at South Florida State College.