Problem 1) A 200-gram alloy of silver and gold consists of 60 wt% Ag and 40 wt% Au. What are the percentages of Ag and Au atoms in this alloy?

Problem 2) Describe the properties related to bonding type and bonding energy for ceramics, metals, and polymers.

Problem 3) Describe atomic number, atomic mass, and isotope.

Problem 4) Open-ended question: How do you think continued research in material science and the study of atoms will shape the future of our society?