SOLUTION From Appendix 1, and density of copper 8.93 g/cm 3 atomic mass of copper = 63.55 amu. The atomic mass indicates that there are 63.55 g Cu Avogadros number of Cu atoms The volume sampled is V sample 1 m 2 1 m 3 1 cm = 0.785 m x 10+ m = 0.785 10-12 cm. Thus, the number of atoms sampled is SECTION 2.1 Atomic Structure 29 N = sample 8.93 g cm 0.785 10-12 cm 3 6.64 1010 atoms. qs 0.602 1024 atoms 63.55 g