mass number

What is the percent abundance of the isotope with the mass number of 67?
A hypothetical element has an atomic weight of 69.72 amu. The two isotopes of this element have mass numbers of 67 and 70. What is the   … Read more

How to find percent abundance of 2 isotopes of an element?
I am given two isotopes of the same element, I am given the atomic weight and mass number of each isotope. How would I find the percent of abundance   … Read more