The atomic weight of copper is less than that of silver. Which of the following statements is true provided you have a 10-g sample of each of these metals?

Question

Quizplus · Accepted Answer

Since atomic weight is a measure of how much one mole (6.022 x 10^23 atoms) of an element weighs, a lower atomic weight for copper compared to silver means that for the same mass (10 g in this case), you would have more atoms of copper than of silver. This is because you can divide the same mass by a smaller atomic weight for copper, resulting in a larger number of moles (and thus atoms) compared to silver.

The Atomic Weight of Copper Is Less Than That of Silver