You want to use a chemical in solid form that is very hard, does not conduct electricity, does not dissolve in water, and has a high melting point. You have an ionic crystal, metallic crystal, molecular crystal and a covalent network crystal available for your use. a. Which erystal would you use? Provide reasons for your answer based upon inter and intramolecular bonding. (L.4, C.2) b. Using your knowledge of inter and intramolecular bonding, give reasons for not using each of the other three crystals. (A.6, Ci1) The solids you have ayailable to you are sodium chloride, crystal iodine, sillcon dioxide and lead. c. Which of these tiolids would you use to fultill the criteria described above and give one reasion for your choice.(6.2) d. Draw a 3D structure of the chemical based upon VSEPA theory (C:1)