These crystals sparkle with the lustrous sheen we think of metals having. They are extremely good conductors of heat and electricity. The melting point of these crystals depends on the metal used in the crystal. Is true?

Copper, silver, aluminum, cobalt, chromium, mercury 

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;