問題詳情
22. Natural copper contains two isotopic forms. The most common isotope is 63Cu (atomic mass 62.93 amu), which is 69.09%abundant. The average atomic mass of Cu is 63.55 amu. What is the mass of the other isotope?
(A) 61.90 amu
(B) 63.10 amu
(C) 64.93 amu
(D) 65.90 amu
(E) 67.10 amu
參考答案