Three naturally occurring isotopes exist for the hypothetical element athenium. 2.50% of athenium atoms have a relative mass of 26.0 amu, 75.0% of athenium atoms have a relative mass of 27.0 amu, and 22.5% of athenium atoms have a relative mass of 28.0 amu. What is the atomic mass of athenium?

Question

Quizplus · Accepted Answer

The atomic mass of athenium can be calculated by multiplying the relative mass of each isotope by its abundance (as a decimal), then summing these products: (0.025 * 26.0) + (0.75 * 27.0) + (0.225 * 28.0) = 27.2 amu.

Three Naturally Occurring Isotopes Exist for the Hypothetical Element Athenium