Additional Questions and Problems 53 2.70 Consider the following solids. The solids A, B, and C represent
aluminum, gold, and silver. If each has a mass of 10.0 g, what
is the identity of each solid? (2.7)
Density of aluminum = 2.70 g/mL
Density of gold = 19.3 g/mL
Density of silver 10.5g/mL

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.