Average atomic mass Knowledge-Based Download PDF

Questions

1. 1.

   A naturally occurring sample of an element consists of two stable isotopes: $^{63}\text{X}$ with an atomic mass of 62.93 amu (69.17% abundance) and $^{65}\text{X}$ with an atomic mass of 64.93 amu (30.83% abundance). What is the average atomic mass of this element?

   • A) 63.93 amu
   • B) 64.31 amu
   • C) 63.55 amu
   • D) 62.93 amu