ecture Quiz #8 (5 pts) CHM 113 Dr. Ron Briggs In an ionic bond, no electrons are shared. Instead, the positive and negative ions are attracted due to Coulombic force, as described by: Here, q1 and q2 are the charges of the ions and d is the distance between them. One measure of the strength of these ionic bonds is a substance's melting point. The more strongly ions are held together, the higher the melting point. Table 1: Radii, charges, and Coulombic force for selected ionic compounds Ionic Compound Radius (pm) cation, anion d (pm) Charge cation, anion x 10-5 NaF 102 , 133 235 1 , -1 1.8 NaCl , 181 283 MgO 72 , 140 MgS 72 , 184 1) Complete the missing values in Table 1 above (ionic compound, radius, d, charges, x 10-5 ) 2) Consider the ionic compounds NaF and NaCl a) In which compound is the Coulombic force of attraction greater? b) NaCl has a melting point of 801 C. Which of the following would you expect to be the melting point of NaF: 609 C, 800 C, or 993 C? Explain your reasoning. 3) Consider the ionic compounds MgO and MgS. a) In