Silver Has Two Stable Isotopes with Masses of 106

Multiple Choice

Silver has two stable isotopes with masses of 106.90509 u and 108.9047 u.The atomic weight of silver is 107.868 u.What is the percent abundance of each isotope?

A) 50.0% ¹⁰⁷Ag and 50.0% ¹⁰⁹Ag
B) 51.8% ¹⁰⁷Ag and 48.2% ¹⁰⁹Ag
C) 55.4% ¹⁰⁷Ag and 44.6% ¹⁰⁹Ag
D) 48.2% ¹⁰⁷Ag and 51.8% ¹⁰⁹Ag
E) 44.6% ¹⁰⁷Ag and 55.4% ¹⁰⁹Ag