The density of gold at the room temperature is 19.3 g/cm3, and the density of gold at its melting point is 17.31 g/cm3. What does this information indicate about the differences between solid gold and liquid gold?

A. When solid gold melts, its particles move farther apart

B. The particles in solid gold have more energy than those in liquid gold

C. When solid gold melts some of its particles evaporates

D. The particles in solid gold have more mass than those in liquid gold

the volume increases

what is the question here. i think you messed up.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.