The average atomic mass for silver is ________.
A) 28.09
B) 14
C) 107.87
D) 47

Question

Quizplus · Accepted Answer

The average atomic mass for an element is the weighted average of the masses of its isotopes, taking into account their relative abundances. The atomic number of silver is 47, which means it has 47 protons in its nucleus. The two most abundant isotopes of silver are 107Ag and 109Ag, with relative abundances of 51.84% and 48.16%, respectively. Using the formula for calculating average atomic mass, (mass of isotope 1 x % abundance of isotope 1 + mass of isotope 2 x % abundance of isotope 2)/100, we get [(107 x 51.84) + (109 x 48.16)]/100 = 107.87. Therefore, the answer is C.

The Average Atomic Mass for Silver Is ________